feat(auth): implement JWT authentication and user registration

- Added JWT authentication with token generation and validation.
- Introduced user registration functionality with email and password.
- Integrated Argon2 for password hashing.
- Created SQLite user repository for user data persistence.
- Updated application context to include user repository and configuration settings.
- Added environment variable support for JWT secret and registration allowance.
- Enhanced error handling for unauthorized access and validation errors.
- Updated presentation layer to handle login and registration requests.

.sqlx/query-18de90feb13b9f467f06d0ce25332d9ea7eabc99d9f1a44694e5d10762606f82.json

@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "INSERT OR IGNORE INTO users (id, email, password_hash, created_at) VALUES (?, ?, ?, ?)",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 4
+    },
+    "nullable": []
+  },
+  "hash": "18de90feb13b9f467f06d0ce25332d9ea7eabc99d9f1a44694e5d10762606f82"
+}