feat: switch ably sse to magicbell websocket endpoint

[smeijer]

This switches the SDKs from Ably SSE to MagicBell's WebSocket endpoint.

Current state is WIP; and waiting for backend changes to be deployed. There are a few // TODO:s in the last commit.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 11, 2024 8:27pm

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commit: 6fc50be

@magicbell/cli

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@magicbell/core

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@magicbell/embeddable

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magicbell

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@magicbell/magicbell-react

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@magicbell/react-headless

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@magicbell/user-client

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@magicbell/webpush

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