ci: add husky pre-commit hooks

[dutifulbob]

Summary

Adds Husky pre-commit hooks to enforce formatting and linting for Go + TypeScript.

• Root with + scripts
• Pre-commit hook runs:
  • and in backend
  •  ERR_PNPM_NO_SCRIPT  Missing script: lint

Command "lint" not found. Did you mean "pnpm run lint:go"? and  ERR_PNPM_NO_SCRIPT  Missing script: format:check

Command "format:check" not found. Did you mean "pnpm run format:check:ts"? in frontend

• Adds Prettier scripts + dependency in frontend

Note: Husky will require running Progress: resolved 1, reused 0, downloaded 0, added 0
Packages: +1
+
Progress: resolved 1, reused 1, downloaded 0, added 1, done

scoop@ prepare /home/bob/scoop
husky install

devDependencies:

• husky 9.1.7

Done in 520ms using pnpm v10.23.0 at repo root (prepare script runs ).

[dutifulbob]

Consolidated Husky hook changes into PR #5. Closing this PR to keep a single CI PR.