feat: Implement OAuth2 authentication with Microsoft, Google, and PocketId

- Added JWT configuration to appsettings.json for secure token handling.
- Updated config.json to include OAuth provider details for Microsoft, Google, and PocketId.
- Added Microsoft icon SVG for UI representation.
- Refactored app.config.ts to use a custom AuthInterceptor for managing access tokens.
- Enhanced auth route guard to handle asynchronous authentication checks.
- Created new auth models for structured request and response handling.
- Developed a callback component to manage user login states and transitions.
- Updated side-login component to support multiple OAuth providers with loading states.
- Implemented authentication service methods for handling OAuth login flows and token management.
- Added error handling and user feedback for authentication processes.

Api/appsettings.json

@@ -1,4 +1,29 @@
 {
+  "Jwt": {
+    "SecretKey": "your-very-secure-secret-key-that-should-be-at-least-32-characters-long",
+    "Issuer": "https://api.yourapp.com",
+    "Audience": "https://yourapp.com",
+    "ExpirationMinutes": 60
+  },
+  "OAuth": {
+    "Providers": {
+      "microsoft": {
+        "Authority": "https://login.microsoftonline.com/4a0d328f-1f94-4920-b67e-4275737d02a5/v2.0",
+        "ClientId": "eb03f08b-280a-46c7-9700-b012caa46000",
+        "ValidAudiences": ["eb03f08b-280a-46c7-9700-b012caa46000"]
+      },
+      "google": {
+        "Authority": "https://accounts.google.com",
+        "ClientId": "1000025801082-09ikmt61a9c9vbdjhpdab9b0ui3vdnij.apps.googleusercontent.com",
+        "ValidAudiences": ["1000025801082-09ikmt61a9c9vbdjhpdab9b0ui3vdnij.apps.googleusercontent.com"]
+      },
+      "pocketid": {
+        "Authority": "https://identity.lesko.me",
+        "ClientId": "21131567-fea1-42a2-8907-21abd874eff8",
+        "ValidAudiences": ["21131567-fea1-42a2-8907-21abd874eff8"]
+      }
+    }
+  },
   "Authentication": {
     "PocketId": {
       "Authority": "https://identity.lesko.me",
@@ -16,5 +41,4 @@
   },
   "AllowedHosts": "localhost",
   "CorsOrigins": "https://localhost:5001,http://localhost:4200,http://localhost:5000"
-    
 }