chore(filtering): Adding column filtering strats

Author: kdinev

ROADMAP.md

@@ -9,7 +9,8 @@
 3. Fluent Theme [#5335](https://github.com/IgniteUI/igniteui-angular/issues/5335)
 4. Drag and Drop enhancements [#5319](https://github.com/IgniteUI/igniteui-angular/issues/5319)
 5. Multi-View Calendar + Range DatePicker [#4282](https://github.com/IgniteUI/igniteui-angular/issues/4282)
-5. Custom grid row selector templates [#4998](https://github.com/IgniteUI/igniteui-angular/issues/4998)
+6. Custom grid row selector templates [#4998](https://github.com/IgniteUI/igniteui-angular/issues/4998)
+7. Per-column Filtering Strategies [#5323](https://github.com/IgniteUI/igniteui-angular/issues/5323)
 
 ## Going down the road