Update file explorer readme (#1780)

* Updated readme

* Updated readme for file explorer module and demo gif

* Updated figure description

* Fixed typo

* Moved the localizaton instruction to separate file

* Updated coding guidance readme

doc/devdocs/guidance.md

@@ -0,0 +1,71 @@
+# Coding Guidance
+
+## Working With Strings
+
+In order to support localization **YOU SHOULD NOT** have hardcoded UI display strings in your code. Instead, use resource files to consume strings. 
+
+### For CPP
+Use [`StringTable` resource][String Table] to store the strings and resource header file(`resource.h`) to store Id's linked to the UI display string. Add the strings with Id's referenced from the header file to the resource-definition script file. You can use [Visual Studio Resource Editor][VS Resource Editor] to create and manage resource files.
+
+- `resource.h`:
+
+XXX must be a unique int in the list (mostly the int ID of the last string id plus one):
+
+```cpp
+#define IDS_MODULE_DISPLAYNAME                    XXX
+```
+
+- `StringTable` in resource-definition script file `validmodulename.rc`:
+
+```
+STRINGTABLE
+BEGIN
+    IDS_MODULE_DISPLAYNAME               L"Module Name"
+END
+```
+
+- Use the `GET_RESOURCE_STRING(UINT resource_id)` method to consume strings in your code.
+```cpp
+#include <common.h>
+
+extern "C" IMAGE_DOS_HEADER __ImageBase;
+
+std::wstring GET_RESOURCE_STRING(IDS_MODULE_DISPLAYNAME)
+```
+
+### For C#
+Use [XML resource file(.resx)][Resx Files] to store the UI display strings and [`Resource Manager`][Resource Manager] to consume those strings in the code. You can use [Visual Studio][Resx Files VS] to create and manage XML resources files.
+
+- `Resources.resx`
+
+```xml
+  <data name="ValidUIDisplayString" xml:space="preserve">
+    <value>Description to be displayed on UI.</value>
+    <comment>This text is displayed when XYZ button clicked.</comment>
+  </data>
+```
+
+- Use [`Resource Manager`][Resource Manager] to consume strings in code.
+```csharp
+System.Resources.ResourceManager manager = new System.Resources.ResourceManager(baseName, assembly);
+string validUIDisplayString = manager.GetString("ValidUIDisplayString", resourceCulture);
+```
+
+In case of Visual Studio is used to create the resource file. Simply use the `Resources` class in auto-generated `Resources.Designer.cs` file to access the strings which encapsulate the [`Resource Manager`][Resource Manager] logic.
+
+```csharp
+string validUIDisplayString = Resources.ValidUIDisplayString;
+```
+
+## More On Coding Guidance
+Please review these brief docs below relating to our coding standards etc.
+
+* [Coding Style](./style.md)
+* [Code Organization](./readme.md)
+
+
+[VS Resource Editor]: https://docs.microsoft.com/en-us/cpp/windows/resource-editors?view=vs-2019
+[String Table]: https://docs.microsoft.com/en-us/windows/win32/menurc/stringtable-resource
+[Resx Files VS]: https://docs.microsoft.com/en-us/dotnet/framework/resources/creating-resource-files-for-desktop-apps#resource-files-in-visual-studio
+[Resx Files]: https://docs.microsoft.com/en-us/dotnet/framework/resources/creating-resource-files-for-desktop-apps#resources-in-resx-files
+[Resource Manager]: https://docs.microsoft.com/en-us/dotnet/api/system.resources.resourcemanager?view=netframework-4.8

src/modules/previewpane/README.md

@@ -1,28 +1,25 @@
-<center>
-
 <img width="200" src="../../../doc/images/Logo.jpg">
 
-# PowerPreview
+# File Explorer
+
+File Explorer add-ons, right now are just limited to Preview Pane additions for File Explorer.
+
+
+## Preview Pane
+
+Preview Pane is an existing feature in the File Explorer which shows a lightweight, rich, read-only preview of the file's contents in the view's reading pane. To enable it, you just click the View tab in the ribbon and then click `Preview Pane`. Below is an example of Markdown and Svg files previews in File Explorer with PowerToys.
+
+![PowerToys Preview Pane Demo](../../../doc/images/preview_pane/demo.gif)
+
 > Adding Custom Preview Handlers to Windows File Explorer Preview Pane.
 
 [**Overview**](#overview) · 
 [**Developing**](#Developing) · 
-[**MSIX Integration**](#Install-With-MSIX) · 
+[**Installation**](#Installation) ·
-[**Contributing »**](#Contributing)
-</center>
 
 ## Overview
 
-Preview handlers are called when an item is selected to show a lightweight, rich, read-only preview of the file's contents in the view's reading pane. This is done without launching the file's associated application. Figure 1 shows an example of a preview handler that preview a .md file type. Please follow this [documentation](https://docs.microsoft.com/en-us/archive/msdn-magazine/2007/january/windows-vista-and-office-writing-your-own-preview-handlers) to start developing a preview handler, when done, continue with this documentation to learn how to integrate a preview handler into PowerToys.
+Preview handlers are called when an item is selected to show a lightweight, rich, read-only preview of the file's contents in the view's reading pane. This is done without launching the file's associated application. Please follow this [documentation](https://docs.microsoft.com/en-us/archive/msdn-magazine/2007/january/windows-vista-and-office-writing-your-own-preview-handlers) to start developing a preview handler, when done, continue with this documentation to learn how to integrate a preview handler into PowerToys.
-
-<center>
-
-<figure>
-  <img src="../../../doc/images/preview_pane/markdown.gif" alt="Mark Down Preview Handler Demo" >
-  <figcaption>Figure 1 : Mark Down Preview Handler Demo</figcaption>
-</figure>
-
-</center>
 
 ## Developing
 
@@ -216,43 +213,3 @@ In the general settings of the Settings UI, you should be able to disable and en
 </figure>
 
 </center>
-
-## Contributing
-
-### Coding Guidance
-
-#### Working With Strings
-
-**YOU SHOULD NOT** have hardcoded strings in your C++ code. Instead, use the following guidelines to add strings to your code. Add the ID of your string to the resource file. XXX must be a unique int in the list (mostly the int ID of the last string id plus one):
-
-- `resource.h`:
-
-```cpp
-#define IDS_PREVPANE_XYZ_SETTINGS_DISPLAYNAME                    XXX
-```
-
-- `powerpreview.rc` under strings table:
-
-```cpp
-IDS_PREVPANE_XYZ_SETTINGS_DISPLAYNAME               L"XYZ Preview Handler"
-```
-
-- Use the `GET_RESOURCE_STRING(UINT resource_id)` method to consume strings in your code.
-```cpp
-#include <common.h>
-
-extern "C" IMAGE_DOS_HEADER __ImageBase;
-
-std::wstring GET_RESOURCE_STRING(IDS_PREVPANE_XYZ_SETTINGS_DISPLAYNAME)
-```
-
-#### More On Coding Guidance
-Please review these brief docs below relating to our coding standards etc.
-
-> 👉 If you find something missing from these docs, feel free to contribute to any of our documentation files anywhere in the repository (or make some new ones\!)
-
-
-
-* [Coding Style](../../../doc/devdocs/style.md)
-* [Code Organization](../../../doc/devdocs/readme.md)
-