* Fix extension freshrss_user_maintenance in actualize_script
Follow-up of https://github.com/FreshRSS/FreshRSS/pull/3440
The hook was called before registering all the extensions for the current user
* PHPStan Level 6 for extensions
And remove 5-year old legacy format of enabled extensions < FreshRSS 1.11.1
* Fix multiple bugs in extensions
* Minor typing
* Don't change signature of methods supposed to be overridden
* PHPStan Level 9 and compatibility Intelliphense
* Set as final the methods not supposed to be overriden
* Refactor entry to GReader API format
Some code was copied in two locations and not completely uniform.
Cleaning of related variables and functions (e.g. better types for entries and categories as objects vs. as IDs).
Usecase: I need to call the same GReader-compatible serialization from an extension
* Fixed some edge cases
* Keep summary instead of content
`summary` and `content` seems to be used interchangeably in the Google Reader API. We have been using `summary` for our client API and `content` in our export/import, so stick to that.
* More PHP type hints for Fever
Follow-up of https://github.com/FreshRSS/FreshRSS/pull/4201
Related to https://github.com/FreshRSS/FreshRSS/issues/4200
* Detail
* Draft
* Progress
* More draft
* Fix thumbnail PHP type hint
https://github.com/FreshRSS/FreshRSS/issues/4215
* More types
* A bit more
* Refactor FreshRSS_Entry::fromArray
* Progress
* Starts to work
* Categories
* Fonctional
* Layout update
* Fix relative URLs
* Cache system
* Forgotten files
* Remove a debug line
* Automatic form validation of XPath expressions
* data-leave-validation
* Fix reload action
* Simpler examples
* Fix column type for PostgreSQL
* Enforce HTTP encoding
* Readme
* Fix get full content
* target="_blank"
* gitignore
* htmlspecialchars_utf8
* Implement HTML <base>
And fix/revert `xml:base` support in SimplePie e49c578817
* SimplePie upstream PR merged
https://github.com/simplepie/simplepie/pull/723
