tari-project / tari / 6395225266

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feat(chat): read receipt feature (#5824)

Description
---
This improves chat by moving chat message types that move over comms
between peers into a specific chat wrapper type `ChatDispatch`. This new
type allows for multiple chat message forms such as a standard chat
message, as well as read, and delivery confirmations.

Motivation and Context
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To enhance the chat FFI feature with check ✅, and double check ✅✅
capabilities such as chat apps like Telegram and WhatsApp. This PR
features refactoring on the contacts service to support new message
types, as well as FFI functionality to interact with the feature,
including callbacks for receiving confirmations.

How Has This Been Tested?
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Cucumber, CI.

What process can a PR reviewer use to test or verify this change?
---
Naming is questionable. But overall does the chat message wrapping fit
our standard practice for similar concepts? The proto/prost enum support
is unique and makes for some awkward `try_from`'s but it works well
enough.

Breaking Changes
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- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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