Add Recurring Events Web Part with data service and UI components

- Implement RecurringEventsDataService for fetching events from SharePoint lists.
- Define types for events and categories in RecurringEventsTypes.
- Create RecurringEventsWebPart to manage properties and render events.
- Develop UI components for displaying events in filmstrip and compact layouts.
- Add localization support for English and German languages.
- Implement tests for core functionalities related to event handling.
- Set up TypeScript and TSLint configurations for the project.

.gitignore

@@ -0,0 +1,18 @@
+node_modules/
+lib/
+dist/
+temp/
+release/
+solution/
+sharepoint/solution/
+*.sppkg
+*.tgz
+coverage/
+*.resx.ts
+*.scss.ts
+*.log
+npm-debug.log*
+.vs/
+.idea/
+.DS_Store
+Thumbs.db