(init): Add initial logger files.

src/typings/LogLevel.ts

@@ -0,0 +1,9 @@
+enum LogLevel {
+  Debug,
+  Information,
+  Warning,
+  Error,
+  Fatal,
+}
+
+export default LogLevel;

src/typings/Transport.ts

@@ -0,0 +1,15 @@
+import LogLevel from './LogLevel';
+
+interface Transport {
+  minLevel: LogLevel;
+
+  /**
+   *
+   * @param level The logging level.
+   * @param module The name of the module. This is defined when logging.
+   * @param content The content of the module.
+   */
+  log(level: LogLevel, module: string, content: string): Promise<void>;
+}
+
+export default Transport;