Release 2.3.0

Functionality:
  * Add configuration to anchor position of messages (#60, 71 in Bugs.md).
  * Add output priorisation (#38, 68 in Bugs.md).
  * Print whether output is active in dump.

Bug Fixes:
  * Fix gamma control (72 in Bugs.md).
  * Add missing commands to example config.
  * Add message_config to dump output.

Example Scripts:
  * Add screenshot script.
  * Make example scripts standalone.

Documentation:
  * Escape html tags in config man page. (#68, 69 in Bugs.md)
  * Improve README.md (#62, 70 in Bugs.md).
  * Improve SECURITY.md.
  * Add CONTRIBUTING.md (#62, 70 in Bugs.md).
  * FAQ: Add Firefox screenshare instructions for wayland.
  * FAQ: Add wlroots downgrading instructions for workaround in case of temporary wlroots incompatibility.
  * Update copyright notices to 2024.

Development Tooling:
  * Add new gpg keys (signed by the old ones).
  * Add PR template.
  * Add dev-FAQ.
  * Remove now-unnecessary fanalyzer pragmas.

docs/pull_request_template.md

@@ -0,0 +1,26 @@
+# Description
+
+<!-- Replace this with a description of your pull request. -->
+<!-- Please reference any relevant issues, PRs etc. -->
+
+## Type of Change
+
+  * [ ] Fix
+  * [ ] Backwards-compatible Feature
+  * [ ] Breaking Change
+
+## Considerations
+
+<!-- Replace this with a description of what might be missing, any points of confusion or -->
+<!-- side effects you would like to point out. -->
+
+## Credit
+
+  * [ ] I want to be credited as YOUR_NAME_OR_PSEUDONYM in your contributor section
+  * [ ] I don't want to be credited.
+
+<!-- (by signing off, you state that you are allowed to contribute and allow us to publish -->
+<!-- your contribution under the MIT License) -->
+
+signed-off-by: YOUR_NAME_OR_PSEUDONYM
+