- Closes#639.
- Adds swift format configuration that removes lint checks so we can use
`swift lint` to perform format-only tests.
- Adds `check` target that invokes format and header checks.
- Adds pre-commit script that runs `make check`.
- Adds `pre-commit` target that installs the check script as a
pre-commit hook.
## Type of Change
- [ ] Bug fix
- [x] New feature
- [ ] Breaking change
- [x] Documentation update
## Motivation and Context
Avoids wasting time and commit rewrites.
## Testing
- [x] Tested locally
- [ ] Added/updated tests
- [x] Added/updated docs
J Logan