Add admin API, permissions, and player management routes

Introduces admin database tables, repository, and service for managing administrators and permissions. Adds new admin routes for banning players, managing cosmetics (capes), changing player passwords and usernames, and handling player textures. Updates user and session services to support admin actions and permission checks. Adds related schema validation for new endpoints.

modules/databaseGlobals.js

@@ -345,6 +345,34 @@ async function setupDatabase() {
             DELETE FROM playerCertificates WHERE expiresAt < NOW();
         `)
         logger.log(`${"clean_expired_certificates".bold} event ready`, ["MariaDB", "yellow"])
+        
+        await conn.query(`
+            CREATE TABLE IF NOT EXISTS api_administrators (
+                id INTEGER PRIMARY KEY AUTO_INCREMENT,
+                username VARCHAR(255) UNIQUE NOT NULL,
+                password TEXT NOT NULL,
+                createdAt DATETIME DEFAULT CURRENT_TIMESTAMP
+            )
+        `)
+        logger.log(`${"api_administrators".bold} table ready`, ["MariaDB", "yellow"])
+
+        await conn.query(`
+            CREATE TABLE IF NOT EXISTS api_administrators_permissions_list (
+                permission_key VARCHAR(64) PRIMARY KEY
+            )
+        `)
+        logger.log(`${"api_administrators_permissions_list".bold} table ready`, ["MariaDB", "yellow"])
+
+        await conn.query(`
+            CREATE TABLE IF NOT EXISTS api_administrators_permissions (
+                administrator_id INTEGER NOT NULL,
+                permission_key VARCHAR(64) NOT NULL,
+                PRIMARY KEY (administrator_id, permission_key),
+                FOREIGN KEY (administrator_id) REFERENCES api_administrators(id) ON DELETE CASCADE,
+                FOREIGN KEY (permission_key) REFERENCES api_administrators_permissions_list(permission_key) ON DELETE CASCADE
+            )
+        `)
+        logger.log(`${"api_administrators_permissions".bold} table ready`, ["MariaDB", "yellow"])
 
         logger.log("MariaDB database successfully initialised!", ["MariaDB", "yellow"])