Update MegaMenu Application Customizer: Version bump to 1.1.0, localization support added, and unnecessary files removed

- Deleted obsolete localization file for English (en-us).
- Updated version number from 1.0.4 to 1.1.0 in manifests.js and manifests.json.
- Added localization support for German (de-de) in a new localization file.
- Removed unnecessary dependencies from manifests.
- Added .gitignore to exclude build artifacts and temporary files.

lib/extensions/megaMenu/MegaMenuApplicationCustomizer.d.ts

@@ -1,27 +1,27 @@
 import { BaseApplicationCustomizer } from '@microsoft/sp-application-base';
 import './MegaMenu.module.scss';
 export declare const UserCustomActionMegaMenuId: string;
-/**
- * Properties for the MegaMenu Application Customizer
- */
 export interface IMegaMenuApplicationCustomizerProperties {
-    /**
-     * The name of the termset to load menu items from
-     */
-    termSetName: string;
-    /**
-     * Optional URL to an external CSS file
-     */
+    termSetName?: string;
+    termSetId?: string;
+    cacheMinutes?: number;
     cssUrl?: string;
+    debug?: boolean;
 }
-/** A Custom Action which can be run during execution of a Client Side Application */
 export default class MegaMenuApplicationCustomizer extends BaseApplicationCustomizer<IMegaMenuApplicationCustomizerProperties> {
     private _topPlaceholder;
+    private _menuContainer;
+    private _renderer;
     onInit(): Promise<void>;
     private _renderPlaceHolders();
-    private _updateCallback;
-    private _renderMegaMenu(termSetName);
+    private _renderMegaMenu(termSetIdentifier, debug?);
     private _getOrCreateContainer(id, placeholder);
-    private _loadExternalCss(cssUrl);
-    private _onDispose();
+    private _loadExternalCss(cssUrl?, debug?);
+    private _onDispose;
+    private _getTermSetIdentifier();
+    private _getCacheMinutes();
+    private _validateCssUrl(cssUrl);
+    private _renderStatus(message);
+    private _isGuid(value);
+    private _isDebugEnabled(debugOverride?);
 }