Replace conventionalcommits.org linter with one using the PR Title

[grayside]

We commonly use the Squash-and-Merge strategy with PRs, which means the message on any given commit does not need to meet the Conventional Commits strategy. Instead, we should lint the PR title, which will be more commonly used.

There are numerous GitHub actions that facilitate this.

[grayside]

I've disabled the conventional commit linter. I will now put together a PR for PR title conventional commit enforcement.