e2e walk through with boost

Now we have the boost integration thanks to @nonsense, and has a more comprehensive deal proposal creation interface in the contract, it's time for another walk-through for both developers and storage provider on how this works e2e!
- [ ] developer flow: contract overview (with deal concepts explanation) @shrenujbansal / @snissn
- [ ] boost SP flow ([docs](https://boost.filecoin.io/experimental-features/fvm-contract-deals))@nonsense
- [ ] register for client contracts and receive events
- [ ] make deals
- [ ] check status on boost UI
- [ ] PSD ✅
- [ ] deal activation ✅
- [ ] whats next!

-- Why do we need an e2e walk through? --
- New fileocin developers are often curious about how the whole deal-making and data onboarding flow like on Filecoin -> they are curious about SP's service!
- client contracts are new to SPs, they are curious about what does this mean to them and what new opportunities it unblocks -> they wanna know what kind of service they are providing and how!