feat(cli): implement config payments list

[BogdanMaryniuk]

Closes #259\n\n## Summary\n- replaces the sh1pt config payments list stub with a read-only manifest reader for sh1pt.config.ts\n- shows provider key, adapter id, enabled/disabled state, default provider, and platform fee when configured\n- adds --json and --config <path> for scripts/smoke tests\n- covers the parser with focused Vitest tests\n\n## Verification\n- pnpm exec vitest run packages/cli/src/commands/config.test.ts\n- pnpm --filter @profullstack/sh1pt typecheck\n- git diff --check\n- pnpm exec tsx packages/cli/src/index.ts config payments list --config boilerplates/axum-supabase/sh1pt.config.ts\n- pnpm exec tsx packages/cli/src/index.ts config payments list --json --config boilerplates/axum-supabase/sh1pt.config.ts

[BogdanMaryniuk]

Security scan note: the vu1nz review itself completed with 0 findings, but the workflow failed in the final Comment on PR step because GitHub Actions returned Resource not accessible by integration for a forked PR comment.\n\nRelevant local/CI verification remains green:\n- pnpm exec vitest run packages/cli/src/commands/config.test.ts\n- pnpm --filter @profullstack/sh1pt typecheck\n- git diff --check\n- GitHub test check passed\n- Socket checks passed\n\nSo this looks like a workflow permissions issue, not a code/security failure.

[ralyodio]

Hey @BogdanMaryniuk — the failing vu1nz security scan check is a CI issue on our side (fork PRs get a read-only token and can't post the review comment). I just pushed a fix to master in b3290b8.

Could you rebase this branch on master so the workflow picks up the fix? Something like:

git fetch upstream
git rebase upstream/master
git push --force-with-lease

Thanks!

[ralyodio]

Update: I went ahead and triggered "Update branch" on this PR, so the rebase isn't needed anymore — CI should re-run with the fixed workflow shortly.