support for public gh app

[karpikpl]

When NUXT_PUBLIC_IS_PUBLIC_APP is set to true, application will read GitHub app installations for logged in user and redirect to the first organization on the returned list.

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (3)

server/routes/auth/github.get.ts:8

• [nitpick] Consider using a proper logging library instead of console for logging.

const logger = console;

server/routes/auth/github.get.ts:43

• [nitpick] The error message 'No organizations found for the user.' could be more descriptive.

console.error('No organizations found for the user.');

server/routes/auth/github.get.ts:49

• The error should be cast to FetchError to ensure proper type handling.

catch (error: FetchError) {