Fix & update phpcs rules

[carstingaxion]

I stumbled upon this error

FILE: includes/core/classes/class-event-query.php
-----------------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 2 ERRORS AFFECTING 2 LINES
-----------------------------------------------------------------------------------------------------------------------------------------------------------
 343 | ERROR | The %i modifier is only supported in WP 6.2 or higher. Found: "%i". (WordPress.DB.PreparedSQLPlaceholders.UnsupportedIdentifierPlaceholder)
 345 | ERROR | The %i modifier is only supported in WP 6.2 or higher. Found: "%i". (WordPress.DB.PreparedSQLPlaceholders.UnsupportedIdentifierPlaceholder)
---

after I removed a // phpcs:ignore ... statement for the mentioned sniff. Curious about the 6.2 version, I started investigating and found that there were two minor syntax errors in one of the config rules.

GatherPress tested itself against the minimum supported WordPress version of 7.4, what is ... let's say early.

Description of the Change

1. I fixed the wrong syntax, which made my mentioned error disappear correctly.

   then I started adding some unrelated other things

2. Allowed to use the 'default' textdomain for strings that are 100%-sure part of core.

3. Added a rule to alert with a warning on @todo comments (Not quiet sure, if this is what we want, or if this makes more trouble)

4. Added the WordPress-Docs ruleset to make sure everything is properly documented and prepare for an automated code-reference

Closes #

How to test the Change

See the results of the test runner.

Changelog Entry

Changed - Fix & updated phpcs rules

Credits

Props @carstingaxion

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[github-actions]

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