tests: Add a regression test for gtk-doc arguments

gobject_typesfile
html_assets

https://github.com/mesonbuild/meson/pull/9807

test cases/frameworks/10 gtk-doc/doc/foobar1/meson.build

@@ -1,8 +1,13 @@
+png = configure_file(input: 'baz.png.in',
+  output: 'baz.png',
+  copy: true)
+
 gnome.gtkdoc('foobar',
   src_dir : [inc, '.'],
   main_sgml : 'foobar-docs.sgml',
   content_files : [docbook, version_xml],
   dependencies: foo_dep,
+  html_assets: ['baz.jpg', png],
   # Manually written types file for regression test:
   # https://github.com/mesonbuild/meson/issues/8744
   gobject_typesfile: 'foobar.types',

test cases/frameworks/10 gtk-doc/doc/foobar2/meson.build

@@ -1,6 +1,13 @@
+types = configure_file(input: '../foobar1/foobar.types',
+  output: 'foobar.types',
+  copy: true
+)
+
 gnome.gtkdoc('foobar2',
   src_dir : inc,
   main_sgml : 'foobar-docs.sgml',
   content_files : [docbook, version_xml],
+  gobject_typesfile: types,
+  dependencies: foo_dep,
   install : true,
   install_dir : 'foobar2')

test cases/frameworks/10 gtk-doc/test.json

@@ -2,6 +2,8 @@
   "installed": [
     {"type": "file", "file": "usr/include/foo-version.h"},
     {"type": "file", "file": "usr/share/gtk-doc/html/foobar/BAR.html"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foobar/baz.jpg"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foobar/baz.png"},
     {"type": "file", "file": "usr/share/gtk-doc/html/foobar/foobar.devhelp2"},
     {"type": "file", "file": "usr/share/gtk-doc/html/foobar/foobar.html"},
     {"type": "file", "file": "usr/share/gtk-doc/html/foobar/FooObj.html"},