Add logging framework with Logger, LoggerFactory, and appenders

- Introduced ILogger interface for logging methods
- Implemented Logger class with various logging levels and message formatting
- Created LoggerFactory for managing logger instances and appender configuration
- Added LoggingLevel enum and mapping for logging level types
- Developed ConsoleAppender and TechnikerMeAppender for different logging outputs
- Implemented appender management with AppenderFactory and base Appender class
- Established Threshold class for controlling logging levels

src/logger/appenders/IAppender.ts

@@ -0,0 +1,5 @@
+import type { LoggingLevelType } from '../LoggingLevel';
+
+export interface IAppender {
+  log(timestamp: string, level: LoggingLevelType, category: string, message: string): void;
+}