feat(env): add support for JWKS discovery endpoints

[awaseem]

What kind of change does this PR introduce?

Feature: Support for JWKS urls

• I added a inline variable that stores the remote cache from Jose when called once, Thinking here was that a subsequent serverless runtimes make requests in the warm pool we don't need to call it over and over again to reduce latency and rely on the underlying lib for caching
• Added some tests with the help of claude

[awaseem]

Moving to draft because change in direction

[kallebysantos]

Looks good to me,
We just need to make sure to this env is not referenced as default exposed.

[tomaspozo]

A small one proposing to support local dev urls

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@supabase/server@53

commit: 5487d92