GlitchTip 5.2 with design refresh and less system requirements

GlitchTip is an open source error and uptime monitoring tool. We added experimental support for Postgres-only mode - no valkey/redis needed. We have an all-in-one script (also experimental) to embed celery and web as one process. Together, this gets the memory requirements quite low. It's a core goal of mine to ensure GlitchTip is as easy to host as possible. Report any issues. I'd love to know any feature requests related to self-hosting too.