feat: Rewrite API in NestJS

[Lms24]

WIP

Rewriting the release registry API in Node/NestJS for dogfooding.

To Port:

• GET /packages
• GET /packages/:packageName/versions
• GET /packages/:packageName/:version
• GET /sdks
• GET /sdks/:sdk_id/:version
• GET /sdks/:sdk_id/versions
• GET /apps
• GET /apps/:app_id/:version
• GET /marketing-slugs
• GET /marketing-slugs/:slug
• GET /aws-lambda-layers
• GET /healthz
• Setup CI (build, lint, test)
• Add Sentry
• caching
• review error handling
• review env variable controls
• review CORS settings
• review custom/additional http headers being set
•  review query params
• do we have custom alerts in sentry?
• do we need ddog in the new version?
• do we have custom alerts on ddog?