ci: enforce the conventional commits

[perk-sumo]

Add a PR check to use https://www.conventionalcommits.org/en/v1.0.0

Use one of the tools mentioned on the page, like comitlint, gitlint or conform.
https://www.conventionalcommits.org/en/v1.0.0/#tooling-for-conventional-commits

[pmalek-sumo]

Let's try adding a linter that checks commits for <tag>: prefix for starters.

[github-actions]

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