Fix CI failures: Build packages before yalc publish

The CI was failing with module resolution errors because packages were being
published to yalc before building them. This meant the lib/ directories were
empty or stale, causing webpack to fail when trying to import from the
published packages.

## Root Cause
Workflows were running `yalc publish` immediately after `yarn install`, but
before building the TypeScript packages. This published empty/stale lib/
directories to yalc, which caused:
- Missing exports errors (./pageLifecycle, ./context, etc.)
- webpack build failures in example apps
- Integration test failures

## Fix
Added `yarn build` step before `yalc publish` in all workflows:
- examples.yml: Build all workspace packages before publishing
- integration-tests.yml: Build react-on-rails package (2 occurrences)
- lint-js-and-ruby.yml: Build react-on-rails package

## Verification
The build step compiles TypeScript to JavaScript and populates lib/ with:
- All exported modules (context.js, pageLifecycle.js, etc.)
- Correct package.json exports definitions
- Complete type definitions

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

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

Author: justin808

.github/workflows/examples.yml

@@ -145,6 +145,10 @@ jobs:
         run: |
           yarn install --no-progress --no-emoji ${{ matrix.dependency-level == 'latest' && '--frozen-lockfile' || '' }}
           sudo yarn global add yalc
+      - name: Build packages before yalc publish
+        # Build all workspace packages (react-on-rails, react-on-rails-pro, react-on-rails-pro-node-renderer)
+        # This ensures the lib/ directories are populated with compiled JS before yalc publish
+        run: yarn workspaces run build
       - name: yalc publish for react-on-rails
         # Use yarn workspace script to publish all workspace packages to yalc
         # Runs the "yalc:publish" script defined in each workspace's package.json

.github/workflows/integration-tests.yml

@@ -139,6 +139,8 @@ jobs:
         run: |
           yarn install --no-progress --no-emoji ${{ matrix.dependency-level == 'latest' && '--frozen-lockfile' || '' }}
           sudo yarn global add yalc
+      - name: Build react-on-rails package
+        run: cd packages/react-on-rails && yarn build
       - name: yalc publish for react-on-rails
         run: cd packages/react-on-rails && yalc publish
       - name: yalc add react-on-rails
@@ -237,6 +239,8 @@ jobs:
         run: |
           yarn install --no-progress --no-emoji ${{ matrix.dependency-level == 'latest' && '--frozen-lockfile' || '' }}
           sudo yarn global add yalc
+      - name: Build react-on-rails package
+        run: cd packages/react-on-rails && yarn build
       - name: yalc publish for react-on-rails
         run: cd packages/react-on-rails && yalc publish
       - name: yalc add react-on-rails

.github/workflows/lint-js-and-ruby.yml

@@ -118,6 +118,8 @@ jobs:
         run: |
           yarn install --no-progress --no-emoji --frozen-lockfile
           sudo yarn global add yalc
+      - name: Build react-on-rails package
+        run: cd packages/react-on-rails && yarn build
       - name: yalc publish for react-on-rails
         run: cd packages/react-on-rails && yalc publish
       - name: yalc add react-on-rails