[gnome-software] (24 commits) ...Merge branch 'refactor-threads19' into 'main'

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  c2f28ac... doc: Add missing pages to the documentation build
  4423aa6... gs-app-query: Add immutable query object for listing apps
  88f9a90... gs-plugin: Add list_apps_{async,finish}() vfuncs
  94f3364... gs-app-query: Add a provides-files property
  dd9bbf6... gs-plugin-helpers: Add helpers for list_apps
  989ed25... packagekit: Make listing apps providing a specific file asy
  3d08c9a... gs-plugin-job: Add helper function for SEARCH_FILES jobs
  34a2d56... gs-plugin-loader: Expose filter function publicly
  8229493... gs-plugin-job-list-apps: Add job class for listing apps
  5dcba9b... gs-plugin-types: Drop GS_PLUGIN_ACTION_SEARCH_FILES
  d91a35e... gs-app-query: Add a filter-func property
  5f3f201... gs-plugin-job-list-apps: Support caller-specified filtering
  ba7630b... gs-app-query: Add a released-since property
  c872005... appstream: Make listing recently updated apps asynchronous
  ba71328... dummy: Make listing recently updated apps asynchronous
  adfc7e6... flatpak: Make listing recently updated apps asynchronous
  8aa3bfe... gs-plugin-loader: Remove default sort function for ACTION_G
  2ef0350... gs-cmd: Use GsPluginJobListApps rather than ACTION_GET_RECE
  36bde44... gs-overview-page: Use GsPluginJobListApps rather than ACTIO
  7a73e87... gs-overview-page: Optimise recently updated apps query a li
  c879ecf... gs-plugin-types: Drop GS_PLUGIN_ACTION_GET_RECENT
  10962d7... build: Bump plugin API version
  9d94745... packagekit: Set task background status in task setup
  ad847b0... Merge branch 'refactor-threads19' into 'main'