Sets up calendar package with core infrastructure

Adds core calendar package components including:
- Base services for events, resources, and settings
- Calendar app and orchestrator
- Build and bundling configuration
- IndexedDB storage setup

Prepares foundational architecture for calendar functionality

.gitignore

@@ -31,3 +31,5 @@ Thumbs.db
 *.userosscache
 *.sln.docstates
 js/
+
+packages/calendar/dist/