man: fix documentation about the size and position trigger

remove various leftovers

github: update codeql actions to v4

update contributors list

renderer/layout: clamp blur_opacity to [0, 1]

renderer/command_builder: fix inconsistent checks for blur

man: fix typo in animation curve names

tools: improve make-a-release.py

changelog: add release v13-rc1

meson: bump version

tools: support multiple changelog lines in one commit

editorconfig: use tab for python

tools: add Behavior changes tag

Merge pull request #1485 from yshui/shader-defines

tests: add a parsing test for `rules`