fix: make explicit tsc typecheck pass

[GoBeromsu]

Summary

• align the repo typecheck config with current Vite/Rollup resolution expectations
• skip third-party library declaration checking for the explicit noEmit typecheck path
• keep the existing source/test flow unchanged

Testing

• pnpm exec tsc --noEmit
• pnpm test

Closes #62

[github-actions]

Test Results

80 tests  ±0   80 ✅ ±0   0s ⏱️ ±0s
11 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 9b34a4b. ± Comparison against base commit 58846f1.

♻️ This comment has been updated with latest results.