feature: AsyncAPI HTML "Try it out" form

[Lancetnik]

It will be great if our HTML documentation (faststream docs serve main:app) will be able to try application' subscribers right from the web.

To reach that, we should make the following:

• fork / contribute AsyncAPI-React to add "Try it out" form and button
• impl minimal ASGI POST Method support to process requests from Web form
• impl POST request processor publishes a message to subscriber on call

I think, this form should be able to send in-memory (using TestBroker) and real messages both

[Shepard2154]

I think I could do that

[Lancetnik]

@Shepard2154 thank you! Go ahead and feel free to ask me about any help!

[Shepard2154]

I left a comment asyncapi/asyncapi-react#914 (comment) to make this feature (provided a small demo). Now I am waiting discussion about it and green light from asyncapi-react maintainer

[Lancetnik]

I left a comment asyncapi/asyncapi-react#914 (comment) to make this feature (provided a small demo). Now I am waiting discussion about it and green light from asyncapi-react maintainer

You pinged the wrong person, but I have fixed the error😄. I hope we can collaborate successfully.