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/LoggingLevelMapping.ts

@@ -0,0 +1,52 @@
+
+import {assertUnreachable} from '@techniker-me/tools';
+import {LoggingLevel, type LoggingLevelType} from './LoggingLevel';
+
+export default class LoggingLevelMapping {
+  public static convertLoggingLevelToLoggingLevelType(loggingLevel: LoggingLevel): LoggingLevelType {
+    switch (loggingLevel) {
+      case LoggingLevel.Off:
+        return 'Off';
+      case LoggingLevel.Info:
+        return 'Info';
+      case LoggingLevel.Warn:
+        return 'Warn';
+      case LoggingLevel.Error:
+        return 'Error';
+      case LoggingLevel.Debug:
+        return 'Debug';
+      case LoggingLevel.Trace:
+        return 'Trace';
+      case LoggingLevel.Silly:
+        return 'Silly';
+      case LoggingLevel.All:
+        return 'All';
+
+      default:
+        assertUnreachable(loggingLevel);
+    }
+  }
+
+  public static convertLoggingLevelTypeToLoggingLevel(loggingLevelType: LoggingLevelType): LoggingLevel {
+    switch (loggingLevelType) {
+      case 'Off':
+        return LoggingLevel.Off;
+      case 'Info':
+        return LoggingLevel.Info;
+      case 'Warn':
+        return LoggingLevel.Warn;
+      case 'Error':
+        return LoggingLevel.Error;
+      case 'Debug':
+        return LoggingLevel.Debug;
+      case 'Trace':
+        return LoggingLevel.Trace;
+      case 'Silly':
+        return LoggingLevel.Silly;
+      case 'All':
+        return LoggingLevel.All;
+      default:
+        assertUnreachable(loggingLevelType);
+    }
+  }
+}