v0.77.0 - fix json serialization and sse response

What's Changed

• fix: Fixes routing issues which causes bugs like authentication bypass... by @thePromger in #1265
• fix: cookies by @sansyrox in #1292
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #1291
• feat: add llms.txt by @sansyrox in #1294
• fix: SSEResponse duplicate CORS headers issue by @sansyrox in #1287
• fix: json serialisation by @sansyrox in #1301
• fix: docs - advanced routing by @sansyrox in #1302

Full Changelog: v0.75.0...v0.77.0