Activity Feed to view all changes (maybe even have a diff viewer)

Idea came from this bug, not being able to know where an older snippet was Labeled by accident: https://support.cacher.io/hc/en-us/community/posts/26846193879565

I know there's a "Last updated" filter but it doesn't count adding/removing a Label as an update.

Plus, I like the idea of having a dedicated Activity Feed / Audit Log view with a few more features:

1. Bob created snippetX with 3 files in it at datetime
2. Sally added label "example" to snippetX at datetime
3. Sally edited file1.txt from snippetX at datetime (maybe even diff viewer would be awesome)