js: Replace yarn with npm (#2130)

Replace yarn with npm. 

The yarn version available in the arch repos, and installed on the
Ubuntu2404 actions runner is 1.22.22.

To publish packages to npmjs with the trusted OIDC publishing, we need
the latest yarn (v4.x) or the latest npm.

I chose to go with the latest npm, it's much better than yarn 👍

Author: svix-mman

.github/workflows/javascript-lint.yml

@@ -28,14 +28,14 @@ jobs:
       - name: Install modules
         run: |
           cd javascript
-          yarn
+          npm install
 
       - name: Lint
         run: |
           cd javascript
-          yarn run check
+          npm run check
 
       - name: Test
         run: |
           cd javascript
-          yarn run test
+          npm run test

.github/workflows/javascript-release.yml

@@ -15,6 +15,10 @@ on:
     types:
       - completed
 
+permissions:
+  id-token: write
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-24.04
@@ -28,15 +32,13 @@ jobs:
           node-version: 'latest'
           registry-url: 'https://registry.npmjs.org'
 
-      - name: Install modules
+      - name: Install modules and update NPM
         run: |
           cd javascript
-          yarn
+          npm install -g npm@latest
+          npm install
 
       - name: Publish
         if: ${{ github.ref_type == 'tag' || startsWith(github.event.workflow_run.head_branch,'v') }}
         run: |
-          cd javascript
-          yarn publish
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          npm publish