Extract commitlint step as separate check

[cristinecula]

cfg/.github/workflows/forge.yml

Lines 22 to 24 in 0732993

	- name: Lint commits
	if: github.event_name == 'pull_request'
	run: npx commitlint --from ${{ github.event.pull_request.head.sha }}~${{ github.event.pull_request.commits }} --to ${{ github.event.pull_request.head.sha }} --verbose

We want the check, but we don't want it to block merging a PR. See this thread for more information: https://neovici.slack.com/archives/C6LJQMJFM/p1760089351783999