Feature: Improving Performance, optimizations, reliability and codebase

**Is your feature request related to a problem? Please describe.**
Full details on the issues https://github.com/0x5bfa/Website/blob/5bfa/codebase-docs/src/routes/blog/posts/outlook-on-the-codebase-toward-vnext/%2Bpage.md

A large number of users have been recently complaining over the performance, optimization and reliablity with Files.

Please reference this issue in every PR that focuses on optimizations to keep track of the progress.

- [x] Home page, favorites and drives
- [x] Sidebar
- [x] Improve performance when resuming multiple tabs from the background (restoring multiple tabs is visibly slow)
- [ ] Thumbnails
- [ ] Deleting large batches of files
- [ ] Less than 1% crash rate (this was achieved in Files v4, however, there are some issues that don't appear in Sentry, and the crash rate might be higher).
- [ ] Improve ram usage
- [ ] Search causes CPU usage to increase
- [ ] Middle click to scroll implementation often stutters can be up to a few seconds.