Implement FeedFeedback API (#3498)

* Implement onViewableItemsChanged on List.web.tsx

* Introduce onItemSeen to List API

* Add FeedFeedback tracker

* Add clickthrough interaction tracking

* Add engagement interaction tracking

* Reduce duplicate sends, introduce a flushAndReset to be triggered on refreshes, and modify the api design a bit

* Wire up SDK types and feedContext

* Avoid needless function allocations

* Fix schema usage

* Add show more / show less buttons

* Fix minor rendering issue on mobile menu

* Wire up sendInteractions()

* Fix logic error

* Fix: it's item not uri

* Update 'seen' to mean 3 seconds on-screen with some significant portion visible

* Fix non-reactive debounce

* Move methods out

* Use a WeakSet for deduping

* Reset timeout

* 3 -> 2 seconds

* Oopsie

* Throttle instead

* Fix divider

* Remove explicit flush calls

* Rm unused

---------

Co-authored-by: dan <dan.abramov@gmail.com>

package.json

@@ -100,6 +100,7 @@
     "@tiptap/react": "^2.0.0-beta.220",
     "@tiptap/suggestion": "^2.0.0-beta.220",
     "@types/invariant": "^2.2.37",
+    "@types/lodash.throttle": "^4.1.9",
     "@types/node": "^18.16.2",
     "@zxing/text-encoding": "^0.9.0",
     "array.prototype.findlast": "^1.2.3",
@@ -151,6 +152,7 @@
     "lodash.samplesize": "^4.2.0",
     "lodash.set": "^4.3.2",
     "lodash.shuffle": "^4.2.0",
+    "lodash.throttle": "^4.1.1",
     "mobx": "^6.6.1",
     "mobx-react-lite": "^3.4.0",
     "mobx-utils": "^6.0.6",