[🐴] Fully implement keyboard controller (#4106)

* Revert "[🐴] Ensure keyboard gets dismissed when leaving screen (#4104)"

This reverts commit 3ca671d9aa.

* getting somewhere

* remove some now nuneeded code

* fully implement keyboard controller

* onStartReached check

* fix new messages pill alignment

* scroll to end on press

* simplify pill scroll logic

* update comment

* adjust logic on when to hide the pill

* fix backgrounding jank

* improve look of deleting messages

* add double tap on messages

* better onStartReached logic

* nit

* add hit slop to the gesture

* better gestures for press and hold

* nits

src/screens/Messages/Conversation/MessageInput.tsx

@@ -58,6 +58,9 @@ export function MessageInput({
     onSendMessage(message.trimEnd())
     playHaptic()
     setMessage('')
+
+    // Pressing the send button causes the text input to lose focus, so we need to
+    // re-focus it after sending
     setTimeout(() => {
       inputRef.current?.focus()
     }, 100)