Handle SSE

[gedw99]

I would like it if I could easily use SSE with benthos.

I would like to be able to tap systems that output http / sse.

I also would like to be able output SSE from benthos to other systems.

Then I would be able to process these SSE messages.

https://github.com/r3labs/sse Is both a sse client and server implementation that is one candidate for not reinventing the wheel.

https://github.com/tmaxmax/go-sse Is another

https://github.com/nlepage/go-wasm-http-server imports the go-sse package and is preferred because it is able to also work in a browser as WASM.

[gedw99]

@mihaitodor we had a brief discussion about this , so adding you to this so that you know I made an issue about this

[gedw99]

This can make the Benthos WASM Editor at https://github.com/mihaitodor/benthos-playground/tree/main/wasm/blobl-editor interactive because of the SSE feature that https://github.com/nlepage/go-wasm-http-server provides.