[ROHIT-JR]

Closes #70

What this adds

New nitrostack/auth/setup.py, exported from nitrostack:

• setup_jwt_auth, setup_api_key_auth, setup_oauth_auth: each returns a dict of keyword arguments for the matching module, so JWTModule.for_root(**setup_jwt_auth()) works. Secrets in the dict are SecretValue (from [auth] SecretValue wrapper for secrets #69), so printing the config never shows them. Plain str secrets are accepted and wrapped.
• validate_auth_env(kind) -> (valid, missing): lists every missing variable, not just the first. Where any one of several variables would do (for example JWKS_URI or an introspection endpoint) they are shown joined with "or".
• print_auth_setup_instructions(kind): prints the steps; never prints a secret.
• generate_test_credentials(): random SecretValue JWT secret and API key on every call, documented as test-only, never printed.

Differences from closed PR #4

PR #4's setup.py added Starlette middleware from a middleware.py that does not exist on develop. The current modules are DI-based, so these helpers return config for the modules instead of patching an app. camelCase aliases and print calls are dropped.

Tests

tests/test_auth_setup.py (19 tests): each helper's output configures its module and the resulting service works (JWT sign and verify, API key list, OAuth fields), all missing variables are reported, partial and complete environments, random test credentials, nothing printed or logged, and unknown kind. Full suite: 844 passed locally (--timeout=60).

Notes

• The environment variable names follow what the repo already documents (JWT_SECRET, API_KEY / API_KEY_<n>, RESOURCE_URI, AUTH_SERVER_URL, JWKS_URI, OAUTH_INTROSPECTION_ENDPOINT).
• README gets a short "Quick auth setup" section.

[AadarshM07]

Reviewed the changes on feat/70-quick-setup against develop. Everything looks good to me. tested the changes locally, test and CI passes as well