[APP-690] better handling of post languages language filtering (#893)

* add SelectLangBtn

* memoized objects that are created to reduce re-creation on re-render

* add langs when uploading post

* only send the top 3 languages otherwise backend will throw error

* mv ContentLanguagesSettings to folder

* add post languages settings modal and state

* fix typos

* modify feed manip to also check langs label on post

* Fix tests

* Remove log

* Update feed-manip.ts

* Fix syntax errors

* UI tuneups

* Show the currently selected languages in the composer

* fix linting

* Use a bcp-47 matching function

* Fix a duplicate language issue

* Fix web

* Dont include lang in prompt

* Make select language btn an observer

* Keep device languages on top of language selection UIs

* Fix android build settings

* Enforce a max of 3 languages in posts

* Fix tests

* Fix types

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Co-authored-by: Paul Frazee <pfrazee@gmail.com>

yarn.lock

@@ -6197,6 +6197,11 @@ batch@0.6.1:
   resolved "https://registry.yarnpkg.com/batch/-/batch-0.6.1.tgz#dc34314f4e679318093fc760272525f94bf25c16"
   integrity sha512-x+VAiMRL6UPkx+kudNvxTl6hB2XNNCG2r+7wixVfIYwu/2HKRXimwQyaumLjMveWvT2Hkd/cAJw+QBMfJ/EKVw==
 
+bcp-47-match@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/bcp-47-match/-/bcp-47-match-2.0.3.tgz#603226f6e5d3914a581408be33b28a53144b09d0"
+  integrity sha512-JtTezzbAibu8G0R9op9zb3vcWZd9JF6M0xOYGPn0fNCd7wOpRB1mU2mH9T8gaBGbAAyIIVgB2G7xG0GP98zMAQ==
+
 better-opn@~3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/better-opn/-/better-opn-3.0.2.tgz#f96f35deaaf8f34144a4102651babcf00d1d8817"