ci: add Go checks to CI

[AdekunleBamz]

PR Title:
Add Go checks to CI + fix README badges

PR Description:
This PR improves contributor feedback and repo accuracy by extending CI coverage to the Go code and fixing README badges that were pointing at a different repository.

Why

• The repo contains multiple Go modules/packages, but CI only validated the Foundry (Solidity) project, so Go regressions could merge unnoticed.
• The README badges referenced base/op-enclave, which is misleading for this repo/fork.

Changes

• Add a new GitHub Actions job that installs Go using go.mod and runs:
  • go vet ./...
  • go test ./...
• Update README badges to point to this repository’s:
  • Releases badge
  • CI workflow badge (.github/workflows/test.yml)

Verification

• GitHub Actions should run two jobs on PRs:
  • Foundry fmt/build/test (existing)
  • Go vet + Go test (new)
• Optional local verification:
  • go vet ./...
  • go test ./...