feat: Add comprehensive documentation suite and reorganize project structure

- Created complete documentation in docs/ directory
- Added PROJECT_OVERVIEW.md with feature highlights and getting started guide
- Added ARCHITECTURE.md with system design and technical details
- Added SECURITY.md with comprehensive security implementation guide
- Added DEVELOPMENT.md with development workflows and best practices
- Added DEPLOYMENT.md with production deployment instructions
- Added API.md with complete REST API documentation
- Added CONTRIBUTING.md with contribution guidelines
- Added CHANGELOG.md with version history and migration notes
- Reorganized all documentation files into docs/ directory for better organization
- Updated README.md with proper documentation links and quick navigation
- Enhanced project structure with professional documentation standards

f_templates/admin.tpl

@@ -0,0 +1,41 @@
+{include file="header.tpl"}
+<div class="row">
+    <div class="col-md-3">
+        <div class="list-group">
+            <a href="/admin" class="list-group-item list-group-item-action">Dashboard</a>
+            <a href="/admin/users" class="list-group-item list-group-item-action">Users</a>
+            <a href="/admin/content" class="list-group-item list-group-item-action">Content</a>
+            <a href="/admin/settings" class="list-group-item list-group-item-action">Settings</a>
+        </div>
+    </div>
+    <div class="col-md-9">
+        <h1>Admin Dashboard</h1>
+        <div class="row">
+            <div class="col-md-4">
+                <div class="card text-white bg-primary">
+                    <div class="card-body">
+                        <h5 class="card-title">Total Users</h5>
+                        <h2>{$stats.users|default:0}</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card text-white bg-success">
+                    <div class="card-body">
+                        <h5 class="card-title">Total Videos</h5>
+                        <h2>{$stats.videos|default:0}</h2>
+                    </div>
+                </div>
+            </div>
+            <div class="col-md-4">
+                <div class="card text-white bg-info">
+                    <div class="card-body">
+                        <h5 class="card-title">Active Streams</h5>
+                        <h2>{$stats.streams|default:0}</h2>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{include file="footer.tpl"}