Feat/go language review rules

[amh1k]

Description

Adds built-in, Go-specific review rules and maps **/*.go files to them.

The new rule focuses on high-confidence Go correctness, concurrency, resource-lifecycle, boundary, and security findings. It includes evidence requirements and avoids duplicating findings better handled by gofmt, go vet, Staticcheck, the compiler, or the race detector.

It preserves the default exclusion of *_test.go files.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring (no functional changes)
• Documentation update
• CI / Build / Tooling

How Has This Been Tested?

• make test passes locally

• Manual testing (describe below)

• Ran go test ./... successfully.

• Added resolver coverage confirming root, nested, and uppercase .GO paths select the built-in **/*.go rule.

• Confirmed the existing *_test.go default exclusion remains covered by allowlist tests.

Checklist

• My code follows the project's coding style (go fmt, go vet)
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or my feature works
• New and existing unit tests pass locally with my changes
• I have updated the documentation accordingly (if applicable)
• I have signed the CLA

Related Issues

Closes #550

[github-actions]

✅ OpenCodeReview: No comments generated. Looks good to me.