ci: change CI to publish to GitHub package registry

package.json changes:
* namespace package under @RaspberryPiFoundation
* Use github npm registry.

Github workflow changes:
* Remove publish workflow - this allows us to simplify publish workflow
* Trigger CI workflow when `experience-cs` branch is updated
* Use NPM_AUTH_TOKEN for downloading private npm packages
* Use NODE_AUTH_TOKEN and grant `packages: write` permission for
  publishing npm package
* Publish scratch-gui npm package as part of CI workflow

Co-authored-by: Chris Lowis <chris.lowis@gofreerange.com>

Author: sebjacobs

.github/workflows/ci.yml

@@ -1,26 +1,28 @@
 name: CI
 
 on:
-  merge_group:
-  pull_request:
-  push: # WARNING: Renovate sometimes automerges without PR, so we MUST build and test renovate/** branches
-  workflow_call:
-  workflow_dispatch:
+  workflow_dispatch: # Allows you to run this workflow manually from the Actions tab
+  push: # Runs whenever a commit is pushed to the repository
+    branches: [experience-cs]
+
+permissions:
+  packages: write # deploy to GitHub Packages
 
 concurrency:
   group: "${{ github.workflow }} @ ${{ github.event.compare || github.head_ref || github.ref }}"
   cancel-in-progress: true
 
 jobs:
   ci:
-    name: Detect affected packages, build and test
+    name: Detect affected packages, build, test and publish
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
-          cache: 'npm'
-          node-version-file: '.nvmrc'
+          cache: "npm"
+          node-version-file: ".nvmrc"
+          registry-url: "https://npm.pkg.github.com"
       - uses: wagoid/commitlint-github-action@9763196e10f27aef304c9b8b660d31d97fce0f99 # v5
       - name: Debug info
         run: |
@@ -61,6 +63,8 @@ jobs:
               - "packages/scratch-vm/**"
 
       - if: ${{ steps.filter.outputs.global == 'true' || steps.filter.outputs.any-workspace == 'true' }}
+        env:
+          NPM_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         uses: ./.github/actions/install-dependencies
 
       - name: Build packages
@@ -87,3 +91,12 @@ jobs:
         uses: ./.github/actions/test-package
         with:
           package_name: scratch-gui
+
+      - name: Publish scratch-gui to GitHub Packages
+        working-directory: ./packages/scratch-gui
+        env:
+          NPM_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          RELEASE_VERSION="0.1.0-experience-cs.$(date +'%Y%m%d%H%M%S')"
+          npm version --no-git-tag-version $RELEASE_VERSION
+          npm publish --access public --tag latest

.github/workflows/publish.yml

@@ -0,0 +1,2 @@
+@RaspberryPiFoundation:registry=https://npm.pkg.github.com
+//npm.pkg.github.com/:_authToken=${NPM_AUTH_TOKEN}

.npmrc

@@ -1,13 +1,16 @@
 {
-  "name": "@scratch/scratch-gui",
+  "name": "@RaspberryPiFoundation/scratch-gui",
   "version": "11.2.0-svg-sanitization.3",
   "description": "Graphical User Interface for creating and running Scratch 3.0 projects",
   "author": "Massachusetts Institute of Technology",
   "license": "AGPL-3.0-only",
-  "homepage": "https://github.com/scratchfoundation/scratch-gui#readme",
+  "homepage": "https://github.com/RaspberryPiFoundation/scratch-editor#readme",
   "repository": {
     "type": "git",
-    "url": "https://github.com/scratchfoundation/scratch-editor.git"
+    "url": "https://github.com/RaspberryPiFoundation/scratch-editor.git"
+  },
+  "publishConfig": {
+    "registry": "https://npm.pkg.github.com"
   },
   "main": "./dist/scratch-gui.js",
   "types": "./dist/types/index.d.ts",