feat: remove legacy DocumentControls component

Remove deprecated DocumentControls from TestDrive JSUI plugin system:
- Remove document-controls.js from plugin asset list
- Remove script reference from HTML template
- Delete legacy document-controls files
- Consolidate all functionality into enhanced control panels

All control panel functionality now provided by enhanced controls:
- ContentsControl (NW): Table of contents and navigation
- StatusControl (E): Document status and metrics
- DebugControl (SE): Debug messages and system info
- EditControl (NE): Editing tools including Reset All button

🤖 Generated with [Claude Code](https://claude.ai/code)

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

markitect/plugins/testdrive_jsui.py

@@ -42,7 +42,6 @@ class TestDriveJSUIEngine(RenderingEnginePlugin):
                 "static/js/core/debug-system.js",
                 "static/js/core/section-manager.js",
                 "static/js/components/debug-panel.js",
-                "static/js/components/document-controls.js",
                 "static/js/components/dom-renderer.js",
                 "static/js/controls/control-base.js",
                 "static/js/controls/contents-control.js",