I18n: Allow translation of extension tags and permissions

The new extension system introduces tags, similar to categories from
legacy add-ons, and permissions. A hardcoded list is supported for
each, available in the docs:
- https://docs.blender.org/manual/en/dev/advanced/extensions/tags.html
- https://developer.blender.org/docs/features/extensions/schema/

This change allows extraction of these new metadata to the translation
files.

In order to disambiguate the new messages, tags use the new "Script"
translation context. Permissions are lower case, so there is a low
risk of collision, and they use the default context.

While the tags are defined per-platform, with extensions.blender.org
being the only one available currently, they are extracted as a single
list.

Pull Request: https://projects.blender.org/blender/blender/pulls/123150

scripts/addons_core/bl_pkg/bl_extension_ui.py

@@ -826,7 +826,7 @@ def extensions_panel_draw_impl(
                     # As it happens dictionary keys & list values both iterate over string,
                     # however we will want to show the dictionary values eventually.
                     if (value := item_remote.permissions):
-                        col_b.label(text=", ".join([iface_(x.title()) for x in value]), translate=False)
+                        col_b.label(text=", ".join([iface_(x).title() for x in value]), translate=False)
                     else:
                         col_b.label(text="No permissions specified")
                     del value
@@ -1183,6 +1183,7 @@ def tags_refresh(wm):
 
 def tags_panel_draw(panel, context):
     from bpy.utils import escape_identifier
+    from bpy.app.translations import contexts as i18n_contexts
     layout = panel.layout
     wm = context.window_manager
     tags_sorted = tags_refresh(wm)
@@ -1194,7 +1195,12 @@ def tags_panel_draw(panel, context):
     for i, t in enumerate(sorted(tags_sorted)):
         if i == tags_len_half:
             col = split.column()
-        col.prop(wm.extension_tags, "[\"{:s}\"]".format(escape_identifier(t)))
+        col.prop(
+            wm.extension_tags,
+            "[\"{:s}\"]".format(escape_identifier(t)),
+            text=t,
+            text_ctxt=i18n_contexts.editor_preferences,
+        )
 
 
 def extensions_repo_active_draw(self, _context):

scripts/modules/_bpy_internal/extensions/permissions.py

@@ -0,0 +1,16 @@
+# SPDX-FileCopyrightText: 2024 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# The purpose of this list is to present the permissions to be picked up by translation.
+
+# The initial list of permissions is the one defined in the manifest schema
+# (https://developer.blender.org/docs/features/extensions/schema/).
+
+permissions = [
+    "camera",
+    "clipboard",
+    "files",
+    "microphone",
+    "network",
+]

scripts/modules/_bpy_internal/extensions/tags.py

@@ -9,6 +9,7 @@
 # Other platforms can send PRs to extend this list further.
 
 addons = {
+    "All",  # Added automatically for legacy add-ons without a category.
     "3D View",
     "Add Curve",
     "Add Mesh",
@@ -23,13 +24,13 @@ addons = {
     "Import-Export",
     "Lighting",
     "Material",
-    "Modeling",
     "Mesh",
+    "Modeling",
     "Node",
     "Object",
     "Paint",
-    "Pipeline",
     "Physics",
+    "Pipeline",
     "Render",
     "Rigging",
     "Scene",

scripts/modules/bl_i18n_utils/bl_extract_messages.py

@@ -1039,6 +1039,24 @@ def dump_addon_bl_info(msgs, reports, module, settings):
         )
 
 
+def dump_extension_metadata(msgs, reports, settings):
+    from _bpy_internal.extensions import (
+        tags,
+        permissions,
+    )
+    i18n_contexts = bpy.app.translations.contexts
+
+    # Extract tags for add-on and theme extensions.
+    for tag in sorted(tags.addons):
+        process_msg(msgs, i18n_contexts.editor_preferences, tag, "Add-on extension tag", reports, None, settings)
+    for tag in sorted(tags.themes):
+        process_msg(msgs, i18n_contexts.editor_preferences, tag, "Theme extension tag", reports, None, settings)
+
+    # Extract extension permissions.
+    for permission in sorted(permissions.permissions):
+        process_msg(msgs, settings.DEFAULT_CONTEXT, permission, "Extension permission", reports, None, settings)
+
+
 ##### Main functions! #####
 def dump_messages(do_messages, do_checks, settings):
     bl_ver = "Blender " + bpy.app.version_string
@@ -1104,6 +1122,9 @@ def dump_messages(do_messages, do_checks, settings):
             process_msg(msgs, settings.DEFAULT_CONTEXT, label, "Add-ons' categories", reports, None, settings)
             process_msg(msgs, settings.DEFAULT_CONTEXT, tip, "Add-ons' categories", reports, None, settings)
 
+    # Get strings from extension tags and permissions.
+    dump_extension_metadata(msgs, reports, settings)
+
     # Get strings specific to translations' menu.
     for lng in settings.LANGUAGES:
         process_msg(msgs, settings.DEFAULT_CONTEXT, lng[1], "Languages’ labels from bl_i18n_utils/settings.py",