Rename all 1,169 components to path-based names with namespace support

Component names now reflect filesystem location using / as path separator
and : as namespace separator for shared components:
  ~sx-header → ~layouts/header
  ~layout-app-body → ~shared:layout/app-body
  ~blog-admin-dashboard → ~admin/dashboard

209 files, 4,941 replacements across all services.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sx/app.py

@@ -187,8 +187,8 @@ def create_app() -> "Quart":
 
         path = request.path
         content_ast = [
-            Symbol("~sx-doc"), Keyword("path"), path,
-            [Symbol("~not-found-content"), Keyword("path"), path],
+            Symbol("~layouts/doc"), Keyword("path"), path,
+            [Symbol("~not-found/content"), Keyword("path"), path],
         ]
 
         env = dict(get_component_env())