feat(server): new email template (#9528)

use `yarn af server dev:mail` to preview all mail template
fix CLOUD-93

.prettierignore

@@ -28,6 +28,7 @@ test-results
 # per files
 tools/cli/src/webpack/error-handler.js
 packages/backend/native/index.d.ts
+packages/backend/server/src/__tests__/__snapshots__
 packages/frontend/native/index.d.ts
 packages/frontend/native/index.js
 packages/frontend/graphql/src/graphql/index.ts