fix: ensure lib is built before examples:build

Add preexamples:build hook to automatically run `npm run build` before
`examples:build`. This ensures examples always type-check against the
latest library code, catching breaking changes during development.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ochafik

package.json

@@ -41,13 +41,14 @@
     "generate:schemas": "tsx scripts/generate-schemas.ts && prettier --write \"src/generated/**/*\"",
     "build": "npm run generate:schemas && node scripts/run-bun.mjs build.bun.ts",
     "prepack": "npm run build",
-    "build:all": "npm run build && npm run examples:build",
+    "build:all": "npm run examples:build",
     "test": "bun test src",
     "test:e2e": "playwright test",
     "test:e2e:update": "playwright test --update-snapshots",
     "test:e2e:ui": "playwright test --ui",
     "test:e2e:docker": "docker run --rm -v $(pwd):/work -w /work -it mcr.microsoft.com/playwright:v1.57.0-noble sh -c 'npm i -g bun && npm ci && npx playwright test'",
     "test:e2e:docker:update": "docker run --rm -v $(pwd):/work -w /work -it mcr.microsoft.com/playwright:v1.57.0-noble sh -c 'npm i -g bun && npm ci && npx playwright test --update-snapshots'",
+    "preexamples:build": "npm run build",
     "examples:build": "bun examples/run-all.ts build",
     "examples:start": "NODE_ENV=development npm run build && bun examples/run-all.ts start",
     "examples:dev": "NODE_ENV=development bun examples/run-all.ts dev",