github: Add script and workflow to automatically update stub report

On every push to master, we now regenerate the tub eport and check
if it's changed from the one currently published on the website.
If it has, we push a new commit to the website

.github/workflows/update_website_report.yml

@@ -0,0 +1,24 @@
+name: Update AVM2 implementation report on website
+
+on:
+  push:
+    branches: [ master ]
+  # FIXME - remove before merging
+  pull_request:
+    branches: [master]
+
+jobs:
+  crowdin:
+    runs-on: ubuntu-latest
+
+    if: github.repository == 'ruffle-rs/ruffle'
+
+    strategy:
+      max-parallel: 1 # Should be 1 to avoid parallel builds
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run website update script
+        run: |
+          ./update-website.sh

update-website.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+set -euxo pipefail
+
+rm -rf /tmp/ruffle-website-update
+mkdir /tmp/ruffle-website-update
+
+cargo run --package stub-report /tmp/ruffle-website-update/implementation.json
+
+cd /tmp/ruffle-website-update/
+git clone https://github.com/ruffle-rs/api-report
+cd api-report
+cargo run -- -s avm2_specification.json -i ../implementation.json -o ../report.json
+
+cd ../
+
+git clone https://github.com/ruffle-rs/ruffle-rs.github.io
+cd ruffle-rs.github.io
+
+if cmp -s "../report.json" "src/app/compatibility/avm2/report.json"; then
+	echo "Report is unchanged, exiting"
+	exit 0
+fi
+
+echo "Report is changed - pushing commit"
+cp ../report.json src/app/compatibility/avm2/report.json
+git add src/app/compatibility/avm2/report.json
+git commit -m "Update AVM2 report from https://github.com/ruffle-rs/ruffle/commit/${GITHUB_SHA}"