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>

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Removed
+- **BREAKING**: Legacy DocumentControls component from TestDrive JSUI plugin system - all control panel functionality now provided by enhanced control panels (ContentsControl, StatusControl, DebugControl, EditControl) with Reset All button functionality moved to EditControl for better maintainability and elimination of code duplication
+
 ## [0.9.0] - 2025-11-14
 
 ### Added