[Feature] enforce `ReceiptEnvelope` embedding by adding trait bound

`::ReceiptResponse` should ALWAYS embed the `::ReceiptEnvelope` in itself

To enforce that we should
- add `+ Receipt + AsRef + AsMut + Into` bounds to the Network trait's `ReceiptResponse` type

Followup work
- define `BlockContext` as it seems to be a set of shared RPC keys

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cc @mattsse should `type ReceiptResponse: ReceiptResponse` also be constrained to ` + AsRef` to ensure that network implementers ALWAYS embed the envelope in the response?

_Originally posted by @prestwich in https://github.com/alloy-rs/alloy/issues/846#issuecomment-2155381974_

ah, right this way we could enforce embedding the receipt type in rpc, so `ReceiptResponse is Receipt + BlockContext`

this makes sense, then we could also add `Into`

_Originally posted by @mattsse in https://github.com/alloy-rs/alloy/issues/846#issuecomment-2156043828_

```