fix: Phase 0 verification — passWithNoTests, prettierignore (P0-009)

Add --passWithNoTests to all vitest test scripts so packages without
test files don't fail CI. Add .prettierignore for auto-generated files
(next-env.d.ts, dist, drizzle, .next). All quality gates now pass:
typecheck, lint, format:check, test, build (18/18 packages).

Closes #9

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.prettierignore

@@ -0,0 +1,6 @@
+pnpm-lock.yaml
+**/next-env.d.ts
+**/dist
+**/node_modules
+**/drizzle
+**/.next