[gnome-initial-setup] (28 commits) ...Merge branch 'wip/port-to-gtk4' into 'master'

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

Summary of changes:

  e3491d1... gnome-initial-setup: Remove unused variable (*)
  5f017fc... welcome: Handle empty version fields (*)
  376e7d4... welcome-widget: Chain up constructed vfunc (*)
  d2066cc... Disable all pages (*)
  b6baaae... build: Drop soup2 build option (*)
  182a970... build: Temporarily disable unused dependencies (*)
  d118d1f... Drop Cheese dependency (*)
  7c61782... Port core widgetry to GTK4 (*)
  8f4cd09... welcome: Port to GTK4 (*)
  4085ab4... language: Port to GTK4 (*)
  ad500af... keyboard: Port to GTK4 (*)
  57bd9f0... network: Port to GTK4 (*)
  76aab76... summary: Port to GTK4 (*)
  71e3e2b... privacy: Port to GTK4 (*)
  d517701... timezone: Port to GTK4 (*)
  ae46a2b... software: Port to GTK4 (*)
  2fe4c0b... goa: Port to GTK4 (*)
  13de947... account: Port to GTK4 (*)
  e436ef5... password: Port to GTK4 (*)
  7665c1d... parental-controls: Port to GTK4 (*)
  fad5a20... driver, page-header: Use GdkPaintable APIs (*)
  03be2bf... assistant: Remove useless GtkBox (*)
  6c98f3a... assistant: Remove old GTK hack (*)
  ecf3b4e... ci: Rework CI to be Arch-based (*)
  4cfebc4... ci: Allow Meson to fall back to build missing deps (*)
  8e9fa79... ci: Remove --fatal-meson-warnings (*)
  f763ed2... build: Check for libadwaita before malcontent-ui (*)
  a258f1c... Merge branch 'wip/port-to-gtk4' into 'master'

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