feat: add forward authentication configuration and UI

- Introduced ForwardAuthConfig model to store global forward authentication settings.
- Updated Manager to fetch and apply forward authentication configuration.
- Added ForwardAuthHandler to create a reverse proxy handler for authentication.
- Enhanced ProxyHost model to include forward authentication options.
- Created Security page and ForwardAuthSettings component for managing authentication settings.
- Implemented API endpoints for fetching and updating forward authentication configuration.
- Added tests for new functionality including validation and error handling.
- Updated frontend components to support forward authentication settings.

frontend/src/api/__tests__/proxyHosts.test.ts

@@ -26,6 +26,7 @@ describe('proxyHosts API', () => {
 
   const mockHost: ProxyHost = {
     uuid: '123',
+    name: 'Example Host',
     domain_names: 'example.com',
     forward_scheme: 'http',
     forward_host: 'localhost',
@@ -36,6 +37,8 @@ describe('proxyHosts API', () => {
     hsts_subdomains: false,
     block_exploits: false,
     websocket_support: false,
+    forward_auth_enabled: false,
+    forward_auth_bypass: '',
     locations: [],
     enabled: true,
     created_at: '2023-01-01',