Takendown state + in-app takedown appeals (#7566)

* takendown screen

* add form, move button inline

* expect type error

* display error

* disable submit if too long

* move around all the ctas

* typos, rm layoutanimation, fix link

* use REASONAPPEAL

src/lib/constants.ts

@@ -52,6 +52,8 @@ export const MAX_DM_GRAPHEME_LENGTH = 1000
 // but increasing limit per user feedback
 export const MAX_ALT_TEXT = 2000
 
+export const MAX_REPORT_REASON_GRAPHEME_LENGTH = 2000
+
 export function IS_TEST_USER(handle?: string) {
   return handle && handle?.endsWith('.test')
 }