feat: Render diffs in email notifications (#4164)

* deps

* diffCompact

* Diffs in email

* test

* fix: Fade deleted images
fix: Don't include empty paragraphs as context
fix: Allow for same image multiple times and refactor

* Remove target _blank

* fix: Table heading incorrect color

server/queues/processors/DebounceProcessor.ts

@@ -18,7 +18,7 @@ export default class DebounceProcessor extends BaseProcessor {
           {
             // speed up revision creation in development, we don't have all the
             // time in the world.
-            delay: (env.ENVIRONMENT === "development" ? 1 : 5) * 60 * 1000,
+            delay: (env.ENVIRONMENT === "development" ? 0.5 : 5) * 60 * 1000,
           }
         );
         break;