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>

account/sxc/pages/account.sx

@@ -8,7 +8,7 @@
   :path "/"
   :auth :login
   :layout :account
-  :content (~account-dashboard-content))
+  :content (~dashboard/content))
 
 ;; ---------------------------------------------------------------------------
 ;; Newsletters
@@ -19,7 +19,7 @@
   :auth :login
   :layout :account
   :data (service "account-page" "newsletters-data")
-  :content (~account-newsletters-content
+  :content (~newsletters/content
     :newsletter-list newsletter-list
     :account-url account-url))