Adding Format verbs capture

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

tree-sitter / tree-sitter-go