Add GHA to check invalid commits

### Overview

We need to create a GitHub Action to check invalid commits, and advise merging those PRs by squashing.

In order to keep the `main` branch tidy, we don't want to rebase PRs that contain fixup commits that fix issues within the PR. So we want to add a PR comment asking the merger to squash those PRs if they're unable combine the commits manually.

### Action Items

- [ ] Create GHA to check commit titles in a PR for invalid messages
- [ ] If found, generate a new comment in the PR advising the merger to either resolve the invalid commits or squash the commits when merging.
- [ ] Do not fail the check. We want the PR to be merge-able.

### Resources/Instructions

- commit message that shouldn't end up in `main` - `[pre-commit.ci] auto fixes from pre-commit.com hooks`