[SDK] Add lexicon codegen pipeline (@atproto/lex) (#11346)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/lib/strings/__tests__/errors.test.ts

@@ -1,5 +1,5 @@
 import {XRPCError} from '@atproto/api'
-import {LexError, XrpcResponseError} from '@atproto/lex-client'
+import {LexError, XrpcResponseError} from '@atproto/lex'
 import {beforeAll, describe, expect, it} from '@jest/globals'
 import {i18n} from '@lingui/core'
 

src/lib/strings/errors.ts

@@ -1,5 +1,5 @@
 import {XRPCError} from '@atproto/api'
-import {LexError} from '@atproto/lex-client'
+import {LexError} from '@atproto/lex'
 import {t} from '@lingui/core/macro'
 
 /**