ci: swap build and typecheck order

Workspace packages that depend on other workspace packages
(fs-loading → fs-http) need built declaration files for tsc
to resolve types. Build must run before typecheck.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Goosterhof

.github/workflows/ci.yml

@@ -18,8 +18,8 @@ jobs:
       - run: npm audit
       - run: npm run format:check
       - run: npm run lint
-      - run: npm run typecheck
       - run: npm run build
+      - run: npm run typecheck
       - run: npm run lint:pkg
       - run: npm run test:coverage
       - run: npm run test:mutation