Adding Format verbs capture

[bab014]

Checklist:

• [X] All tests pass in CI.
• [ ] There are sufficient tests for the new fix/feature.
• [X] Grammar rules have not been renamed unless absolutely necessary.
• [X] The conflicts section hasn't grown too much.
• [X] The parser size hasn't grown too much (check the value of STATE_COUNT in src/parser.c).

Looking to add support for capturing Golang format verbs, Format Verbs

Relatively new to this so I started simple. It's only looking for an alpha character after a percent symbol