fix(tendermint): Fix deserialization from serde_json::Value

[oblique]

Fixes #1474

• Referenced an issue explaining the need for the change
• Updated all relevant documentation in docs
• Updated all code comments where relevant
• Wrote tests
• Added entry in .changelog/

[oblique]

Some questions:

1. CowStr can also be used in any place of tendermint-rs that uses String::deserialize etc. Should I change all of them?
2. Do you like CowStr or should I just use String?

[romac]

Some questions:

1. CowStr can also be used in any place of tendermint-rs that uses String::deserialize etc. Should I change all of them?

This can be done in a follow-up PR :)

2. Do you like CowStr or should I just use String?

CowStr is fine!

[romac]

Can you please add a changelog entry in the appropriate subdirectory in .changelog/? Then I'll gladly merge this :)

[melekes]

@oblique hey! Sorry for the delay here. Do you have the capacity to finish this?

[melekes]

👍

[oblique]

@melekes Hey, sorry, I completely forgot about this PR. Thanks for pinging. I added the changelog, I hope it's how you want it.

[melekes]

@oblique can you check https://github.com/informalsystems/tendermint-rs/actions/runs/14374893733/job/40323179340?pr=1475 ?

[oblique]

@melekes fixed all the clippy issues of tendermint-proto and tendermint