atproto: add proper locking to reading from lexicon repo

fix: login on mobile failing metadata verification

media: fix TestMPEGTSVideoMP4AudioToMP4Invalid test flake

feeds: don't show livestreams with empty URIs

feat: add PDS login

fix: don't crash when labeler firehose is not available

chore: bump indigo, make use of new package names

fix: delete chat messages locally so we don't restore

feat: typeahead in login

fix: make the 'about' page scrollable

media: segmentation fixes

feat: helper functions to fall back to DID if handle not available

feat: polyfill date to sync client time

Co-authored-by: Eli Mallon <eli@stream.place>

fix: import the tl files correctly on native

feat: split login out to a modal

media: implement rtmprec

fix: add danmu back to router

(means we 100% don't have a current oauth session)