docs: consolidate documentation into organized structure

- Move 12 markdown files from root to docs/ subdirectories
- Organize documentation by category:
  • docs/troubleshooting/ (1 file)  - Technical troubleshooting guides
  • docs/deployment/      (4 files) - Deployment and security documentation
  • docs/guides/          (3 files) - Feature-specific guides
  • docs/planning/        (4 files) - Planning and improvement proposals

Root directory cleanup:
- Reduced from 16 to 4 markdown files in root
- Only essential project files remain:
  • CLAUDE.md (AI instructions)
  • README.md (Main project readme)
  • CLEANUP_PLAN.md (Current cleanup plan)
  • SRC_STRUCTURE_IMPROVEMENTS.md (Structure improvements)

This improves:
✅ Documentation discoverability
✅ Logical organization by purpose
✅ Clean root directory
✅ Better maintainability

src/Framework/Router/MediaRoutes.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Router;
+
+/**
+ * Media routes for file serving
+ */
+enum MediaRoutes: string implements RouteNameInterface
+{
+    case SHOW_IMAGE = 'show_image';
+
+    public function getCategory(): RouteCategory
+    {
+        return RouteCategory::MEDIA;
+    }
+
+    public function isApiRoute(): bool
+    {
+        return false;
+    }
+
+    public function isAdminRoute(): bool
+    {
+        return false;
+    }
+
+    public function isWebRoute(): bool
+    {
+        return false;
+    }
+
+    public function isAuthRoute(): bool
+    {
+        return false;
+    }
+}