fix(ci): fix publish job failure and Node.js deprecation warnings

- Add FORCE_JAVASCRIPT_ACTIONS_TO_NODE24 env to silence deprecation warnings
- Skip publish when NPM_TOKEN secret is not set
- Bump publish job to Node 22
- Version already on npm correctly skips publish (was failing before)

Author: Vaibhav Rajput

.github/workflows/ci.yml

@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -39,7 +42,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           registry-url: https://registry.npmjs.org
           cache: npm
 
@@ -58,7 +61,7 @@ jobs:
           fi
 
       - name: Publish
-        if: steps.check.outputs.exists == 'false'
+        if: steps.check.outputs.exists == 'false' && secrets.NPM_TOKEN != ''
         run: npm publish --provenance --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}