* Fix TipTap getting loaded as CommonJS when the intent is to use the ES Module version.
* `package.json` change also makes explicit exports required
* Update `core` utilities exports to include all utilities
* Update tests to use exported utilities
* add new addOptions option
* replace defaultOptions with addOptions for all extensions
* replace defaultOptions with addOptions for all demos
* replace defaultOptions with addOptions in docs
* refactoring
* refactoring
* drop object support for addOptions
* fix optional options
* fix tests