fix(config): switch configuration loading and saving from npmextra.json to smartconfig.json

ts/tswatch.classes.tswatch.ts

@@ -9,7 +9,7 @@ import { logger } from './tswatch.logging.js';
 /**
  * TsWatch - Config-driven file watcher
  *
- * Reads configuration from npmextra.json under the key '@git.zone/tswatch'
+ * Reads configuration from smartconfig.json under the key '@git.zone/tswatch'
  * and sets up watchers, bundles, and dev server accordingly.
  */
 export class TsWatch {
@@ -27,7 +27,7 @@ export class TsWatch {
   }
 
   /**
-   * Create TsWatch from npmextra.json configuration
+   * Create TsWatch from smartconfig.json configuration
    */
   public static fromConfig(cwdArg?: string): TsWatch | null {
     const configHandler = new ConfigHandler(cwdArg);