remove json patch

[rmorshea]

closes: #877

Checklist

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[rmorshea]

@Archmonger, at the moment, this change proposes that all messages between the server and client contain a type key. For example:

{
    "type": "layout-event",
    ...
}

This anticipates the possibility of a message routing system that components could hook into. For example, the following could be possible in the future:

@component
def Example():
    messenger = use_messenger(receives="custom-recv-type", sends="custom-send-type")

    @use_effect
    async def message_receiver():
        while True:
            inbound = await messenger.receive()
            ...
            await messenger.send(outbound)

    ...

My thinking with the single type key is that in the future, if more information is needed, any of the following could be done:

• Version information could be communicated either by encoding it into the type string (e.g. layout-event@v1.0)
• Extra metadata could be defining new messages types with that added information.
• Arbitrary message metadata could be communicated by defining handshake message types that the client/server open their communication with and that they use to declare what message types and versions they use. (this seems preferable)

I'm open to alternatives though. For example, adding a header key to each message which is an object containing things like the message type and version. This has the advantage of reserving a namespace under which other useful information could be added in the future. However, I think this might encourage adding a bunch of redundant boilerplate to message headers that could impact performance.

[Archmonger]

I support this configuration. However, I don't support encoding the version into the type string (layout-event@v1.0).

I would suggestion this format

{
    "type": "layout-event",
    "version": 1,  # `version` should be optional. If undefined, assume latest version of the API.
    ...
}