hợp nhất

[Huynhthuongg]

#23 (review)

Summary by cubic

Bootstraps GitBot with a Go backend and a Next.js frontend for PR
review, adds CI workflows and Vercel Web Analytics, and introduces GPLv3
licensing with a new logo.

• New Features

• Go backend: register/login with bcrypt + JWT, in‑memory cache with
  TTL, email queue stub, Slack/Discord webhooks; Docker Compose with
  Postgres and Redis (health checks).

• Next.js frontend: auth page and PR diff viewer (DiffViewer,
  FileFilter, Stats, ApprovalPanel, Sidebar/Header) with updated styles.

• CI/tooling: CodeQL, Hadolint, Terraform policy validator, and Next.js
  Pages deploy; issue templates, FUNDING, VS Code settings, README
  refresh; new gitbot-logo.svg.

• Licensing: added GPLv3 (giấy phép npmjs) and a license chooser
  document.

• Dependencies

• JS: added @vercel/analytics, lucide-react; bumped esbuild to
  ^0.28.1.

• Go: added github.com/lib/pq and updated golang.org/x/crypto to
  v0.45.0.

^{Written for commit 783ba31.
Summary will update on new commits.}

---

Signed-off-by: dependabot[bot] support@github.com
Signed-off-by: Huỳnh Thương 252359928+Huynhthuongg@users.noreply.github.com
Co-authored-by: v0agent it+v0agent@vercel.com
Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Claude 242468646+Claude@users.noreply.github.com