chore(cli): release 0.1.8

[dongmucat]

Bumps CLI version to 0.1.8.

Local build-and-test passed (lint, typecheck, test, build).

After merging, tag and push to trigger the release:

git fetch origin main
git checkout main
git merge --ff-only origin/main
git tag cli-v0.1.8 origin/main
git push origin cli-v0.1.8

Watch the release: https://github.com/iflytek/skillhub/actions/workflows/release-cli.yml