Query callbacks (microsoft#1721)

* Add callbacks to global search

* Add callbacks to local search

* Add streaming callbacks in local search CLI

* Add callbacks to basic search

* Add callbacks to DRIFT search

* Semver

* Return generators directly in API

* Guard callbacks

Author: natoverse

.semversioner/next-release/major-20250219010328495371.json

@@ -0,0 +1,4 @@
+{
+  "type": "major",
+  "description": "Rework API to accept callbacks."
+}