feat(docker/ci): migrate Docker and CI from npm to bun

Docker changes:
- Use oven/bun:1-debian as base image instead of node:20-trixie-slim
- Replace npm ci with bun install --frozen-lockfile
- Replace npm run commands with bun run
- Mount bun.lock instead of package-lock.json
- Update cache paths for Bun's cache directory
- Rename NPM_RUN_PRUNE env var to BUN_RUN_PRUNE

CI workflow changes:
- Update bashlib.sh npm-install function to use bun
- Update superset-frontend.yml to use bun run commands
- Update release.yml to use setup-bun action and changesets
- Update superset-e2e.yml to use setup-bun action
- Update superset-playwright.yml to use setup-bun action
- Update superset-translations.yml to use setup-bun action

Note: superset-embedded-sdk and superset-websocket remain on npm
as they are separate packages with their own lockfiles.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker/docker-frontend.sh

@@ -27,18 +27,18 @@ if [ "$BUILD_SUPERSET_FRONTEND_IN_DOCKER" = "true" ]; then
     echo "Building Superset frontend in dev mode inside docker container"
     cd /app/superset-frontend
 
-    if [ "$NPM_RUN_PRUNE" = "true" ]; then
-        echo "Running \"npm run prune\""
-        npm run prune
+    if [ "$BUN_RUN_PRUNE" = "true" ]; then
+        echo "Running \"bun run prune\""
+        bun run prune
     fi
 
-    echo "Running \"npm install\""
-    npm install
+    echo "Running \"bun install\""
+    bun install
 
     echo "Start webpack dev server"
     # start the webpack dev server, serving dynamically at http://localhost:9000
     # it proxies to the backend served at http://localhost:8088
-    npm run dev-server
+    bun run dev-server
 
 else
     echo "Skipping frontend build steps - YOU NEED TO RUN IT MANUALLY ON THE HOST!"