Migrate all components to secondary entry points

- Moved 40 component directories from src/lib/ to individual entry points
- Created core entry point aggregating core, services, data-operations, date-common
- Created directives entry point
- Each entry point has: ng-package.json, index.ts, README.md
- Preserved git history using git mv
- 1214 files reorganized following Angular Package Format

Co-authored-by: kdinev <[email protected]>

Author: Copilot

projects/igniteui-angular/accordion/README.md

@@ -0,0 +1 @@
+export * from './src/accordion/public_api';

projects/igniteui-angular/accordion/index.ts

@@ -0,0 +1,2 @@
+{
+}