feat: update environment configuration and enhance presence management

- Updated .env.example to use more secure database credentials.
- Modified Dockerfile to remove unnecessary data copy.
- Enhanced README with additional setup instructions and security notes.
- Updated docker-compose files to improve database connection handling and security.
- Added error messages for invalid channel and role resolutions in locales.
- Introduced new scripts for code quality checks in package.json.
- Refactored presence management logic to improve state handling and timer management.
- Added tests for argument tokenizer, command definition, presence types, and template variables.

package.json

@@ -9,6 +9,9 @@
   "scripts": {
     "dev": "tsx watch src/index.ts",
     "build": "tsc -p tsconfig.json",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "test": "node --import tsx --test src/**/*.test.ts",
+    "check": "npm run typecheck && npm run test",
     "start": "node dist/index.js",
     "deploy:commands": "tsx src/scripts/deployCommands.ts"
   },