Version 2.1.0 — Tests, lint/typecheck, publish guards, and src/ layout

Highlights

Minor release focused on maintainer tooling, quality gates, and a clearer src/ project layout. No intentional breaking changes to the public runtime API (app.use(...), GoogleLogin, helpers).

Tooling & quality

• Tests: Vitest + Vue Test Utils with mocked Google Identity Services for fast, deterministic checks.
• Lint & types: ESLint (Vue + TypeScript) and vue-tsc typechecking via npm run lint.
• Git hooks: Husky pre-commit runs lint + tests.
• Publish: prepublishOnly runs lint + tests + build so published dist/* matches what was verified.

Architecture (repository layout)

• Replaced the old src/plugin/ tree with a flatter src/ structure (e.g. components/, composables/, google/, utils/, plus shared modules at src/ root).
• @/ path alias for internal source imports (Vite, Vitest, Rollup); published bundles in dist/ remain resolved paths for consumers.

Housekeeping

• Removed unused assets/deps where applicable (e.g. stray lockfiles / unused docs assets); npm-only lockfile going forward.