Picker data source: Add support for pickable filters (#20491)

* add pickable to vs code dictionary

* set up types for pickable filters in data sources

* pass search pickable filter to search result

* apply filter config in document data source example

* add pickable filters to custom tree example

* Update input-entity-data.context.ts

* remove unused

* Update types.ts

.vscode/settings.json

@@ -1,5 +1,8 @@
 {
   "cSpell.words": [
+    "backoffice",
+    "pickable",
+    "Pickable",
     "unprovide",
     "Unproviding"
   ],