Release v0.2.8

ci: disable npm publishing; skip apt-repo job when GPG key unset (#45)

- Disable the publish-npm job in the release workflow (if: false; original
  condition preserved in a comment for easy re-enable).
- Gate the update-apt-repo job on vars.APT_SIGNING_KEY_ID so it skips cleanly
  when the GPG signing key/variable are not configured, instead of failing the
  Sign Release with GPG step with 'no valid OpenPGP data found'.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Merge pull request #43 from AgoraIO/release/v0.2.6

Release/v0.2.6

Merge pull request #40 from sunshinexcode/feat/cn-profile-support

Add region-aware CLI profile support

Split npm release authentication

Merge pull request #25 from AgoraIO/fix/cosign-bundle-signing

Fix release Cosign bundle signing

Release v0.2.1

Release v0.2.0