feat: implement MariaDbOperationService for database management and add MariaDB configuration template

src/main/services/MariaDbOperationService.ts

@@ -103,7 +103,7 @@ export class MariaDbOperationService {
 
     async createDatabaseAndUser(config: MariaDbConfig, dbName: string, user: string, pass: string): Promise<{ success: boolean; message: string }> {
         const queries = [
-            `CREATE DATABASE IF NOT EXISTS \`${dbName}\` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;`,
+            `CREATE DATABASE IF NOT EXISTS \`${dbName}\` CHARACTER SET utf8 COLLATE utf8_unicode_ci;`,
             `CREATE USER IF NOT EXISTS '${user}'@'%' IDENTIFIED BY '${pass}';`,
             `GRANT ALL PRIVILEGES ON \`${dbName}\`.* TO '${user}'@'%';`,
             `FLUSH PRIVILEGES;`