feat: add authentication and admin features

- Added `jose` library for JWT token generation and verification.
- Implemented login functionality with token storage using cookies.
- Created `HeaderAdmin` component for admin panel with login/logout capabilities.
- Developed `LoginForm` component for user authentication.
- Added `Table` component to display data with caching from localStorage.
- Introduced `SubHeaderAdmin` for additional admin actions.
- Enhanced `database.js` with functions for admin login and fetching table data.
- Updated `server.js` to handle new routes for login and table data retrieval.
- Modified `package.json` and `package-lock.json` to include new dependencies.

backend/package-lock.json

@@ -13,6 +13,7 @@
         "dotenv": "^17.2.1",
         "ejs": "^3.1.10",
         "express": "^5.1.0",
+        "jose": "^6.0.12",
         "mysql2": "^3.14.3"
       }
     },
@@ -563,6 +564,15 @@
         "node": ">=10"
       }
     },
+    "node_modules/jose": {
+      "version": "6.0.12",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-6.0.12.tgz",
+      "integrity": "sha512-T8xypXs8CpmiIi78k0E+Lk7T2zlK4zDyg+o1CZ4AkOHgDg98ogdP2BeZ61lTFKFyoEwJ9RgAgN+SdM3iPgNonQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/long": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/long/-/long-5.3.2.tgz",