* Copy CustomCSS and CustomJS
Original: FreshRSS/Extensions@9f21984
* Rename CustomCSS -> UserCSS
* Rename CustomJS -> UserJS
* Change metadata
The name is used for the directory where the configuration
is stored and should not contain spaces.
Since the name was changed, I reset the version number and
changed to semantic versioning.
* Change data directory
Changed the location of the configuration file to
the user data directory, because it is not `static`.
That way, the user's configurations are gathered
in the user directory, which makes it easier to backup them.
* Edit documentations
Remove procedures to install the extension
because it is no longer necessary.
* Fix wrong variables in the configuration page
Remove permission error indication because the storage location
is now in the user data directory managed by the application.
* Remove the `xExtension-` prefix for core extensions
* Set version to 1.0.0 for UserCSS, UserJS
* Refactoring
* Remove unused variables
* Remove version 0.0.1 in Changelog
Version 0.0.1 will not be merged, so only version 1.0.0 will remain.
* public getFileUrl
* Revert more protected
* Use entrypoint for extension user path instead of name
* Add space to extension name
* Add `#[\Override]`
* Add explains of User CSS and User JS to docs
* Remove README of User CSS and User JS
* Add migration code for extension user path
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Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
