* [vcpkg docs] add docs for manifest files
These are just for the maintainer docs,
not user docs.
* [vcpkg] EBNF-ify platform expression parsing
this modifies nothing about what strings are accepted or rejected,
it just moves stuff around.
also adds tests.
* [vcpkg docs] add manifest mode example
* [wip] docs for augustin
also fix tabs
* [vcpkg manifest] switch to using maps for features
* Apply suggestions from code review
* un-experimentize format-manifest
* flesh out the user manifest mode docs
* CRs
* billy CRs
* final personal pass-thru
* [vcpkg format-manifest] initial convert-control attempt
TODO: manifest comments! we should keep $directives
* Finalize x-format-manifest
First, fix Json::parse -- "\c", for any c, was incorrectly parsed.
It would emit the escaped character, and then parse the character, so
that `\b` would give you { '\b', 'b' }.
Second, canonicalize source paragraphs as we're parsing them. This found
an error in qt5 -- The `declarative` feature was listed twice, and we
now catch it, so I removed the second paragraph.
Add PlatformExpression::complexity to allow ordering platform
expressions in a somewhat reasonable way.
Notes:
- We allow `all_modules` as a feature name for back-compat with
paraview
- In order to actually convert CONTROL to vcpkg.json, we'd need to
rename the qt5 `default` feature.
- We need to add support for $directives in x-format-manifest
* fix qt5 port
* format
* fix compile
* fix tests for canonicalization
* Clean up code
* add error message for nothing to format
* add extra_info field
* add `const X&` overloads for `Object::insert[_or_replace]`
* fix compile
* simple CRs
* add tests
* format
* Fix mosquitto port file
also unmerge a line
* fail the tests on malformed manifest
* fix format_all
* fix coroutine port-version
* format manifests
