Only reads the topics that are necessary to load the page.

- Added required tag in number macro in
`rtng_macros.html`
- Changed var name $num_rows to $topics_count
- Improved vars for `sql_query_limit()`

- Added events to `rtng_body_site`
- Added events to `rtng_body_topbottom`
- Changed, better support for phpBB Collapsed Categories

- Remove null coalescing operator with no effect.
- Fixed TypeError when `getforumlist()` returns no forum

This reverts commit 450937d.

- Added vars in event `modify_tpl_ary`. `$disp_topic_title` and properties of the first unread post to `$row`.
- Update CHANGELOG.md
- Update Events.md

…opics

- Changed ternäre operators to coalescing operator
- Changed ternäre operators to type-casting

- A switch has been added to the load settings to deactivate the request for the first unread post.
- The SQL query has been expanded and optimized.
- The evaluation conditions for information on read and unread posts from the database or cookie have been improved.

- Migration: Set the load setting to true when link to unread post used
- Removed old template code from "Collapse Forum Cat"
- Improved ITEM_MOVED handling for unread posts

- Changed php min to v8.0.
- Changed Cached “rtng_user_data” reduces DB queries.
- Changed Improved SQL query for topic counting for better performance.
- Changed assign_block_vars() replaced in main_listener.
- Changed assign_block_vars() replaced in page_controller.
- Changed phpBB template code replaced with Twig syntax.

* Classes have been switched to constructor property promotion.
* Explicit nullability is now implemented using a union type.

* A function for reading metadata (`composer.json`) has been added to the Common class.
* Template variables have been adapted to the new function.
* In the ACP module, the display name is now inserted into the subtitle using a placeholder.
* Minor changes have been made to the language files.

-Pagination generates an incorrect list if the start value is outside the range.

- Fixed Message `RTNG_NO_TOPICS` don't display on index.
- Fixed In rare cases, validate_start() may return -1.
- Changed `sql_query_limit` to `sql_query` for better performens.

…rked as unread.

- Added class `.unread` to the icon link

* Applies to all RTNG sites, as well as "Who is online?".
* Minor optimizations to language variables.

- Cache sql query for ananymous  userdata
- Adjust topictitle font size in side view

- Improved explanation of the server load setting
- Update ´README.md´