[gtk] (32 commits) ...Merge branch 'wip/otte/nodeeditor2' into 'master'

[Benjamin Otte <otte src gnome org>]

Summary of changes:

  3c6aa84... cssparser: Add gtk_css_parser_has_number() (*)
  01a7c7a... Parse render nodes from text files (*)
  b6838cb... testsuite: Add tests for the new node parsing code (*)
  50e10cd... testsuite: Delete some node tests (*)
  4d98e96... testsuite: Port gl tests to text-based format (*)
  08e9725... Move working tests to new directory (*)
  1d6134f... testsuite: Add a broken test (*)
  e31856f... testsuite: Add serialize-deserialize tests (*)
  61a963d... testsuite: add another nodeparser crash test (*)
  9598e16... testsuite: add shadow node parser test (*)
  44b3b89... testsuite: Print serialized nodes when parsing fails (*)
  349e6af... testsuite: Remove broken GL comparison tests (*)
  1000d97... testsuite: Add cross-fade-in-opacity test (*)
  3a9fa03... testsuite: Remove gl_tests infrastructure (*)
  58666c6... testsuite: Add another gl renderer test (*)
  fb63364... rendernode: Remove old GVariant (de)serialization code (*)
  a55ebf2... testsuite: Remove old cairo/vulkan tests (*)
  5530331... testsuite: Black out parts of reftest (*)
  dde6980... Add error func to node deserialization (*)
  5010461... ci: Don't disable the gsk suite (*)
  8c04129... testsuite: Add nodeparser test case (*)
  b4f5baf... rendernode: Parse and print blend nodes properly (*)
  008b7bc... Add gtk4-node-editor (*)
  da5b99f... testsuite: Add rounded-rect parsing test (*)
  559ae8b... gsk: Export Cairo renderer (*)
  6594ccf... gsk: Export gsk_gl_renderer_new() (*)
  cc5f2f8... gsk: Export gsk_broadway_renderer_new() (*)
  3f24ad7... gsk: Export gsk_vulkan_renderer_new() (*)
  00b9471... node-editor: Add renderings with alternative renderers (*)
  43a5ff8... testsuite: Add serialize test for debug node (*)
  d5d48af... gl renderer: Reset opacity when offscreen-rendering crossfa (*)
  cfea8de... Merge branch 'wip/otte/nodeeditor2' into 'master'

(*) This commit already existed in another branch; no separate mail sent