Fix: find places where code crashes and fix

[jurij-jukic]

• - hyperprocess-macro/src/lib.rs:1076 uses unreachable! for unexpected enum variants; any deserialization drift between request variants and handlers will crash the component instead of logging and rejecting the request.
• - hyperprocess-macro/src/lib.rs:1120-1135 serializes handler results with serde_json::to_vec(...).unwrap() and then calls resp.send().unwrap(); any serialization failure or send error will panic rather than surfacing an error back to the caller. --> error cannot be triggered unless custom serialization logic is used. No fix needed. Similar situation in other serde unwraps.

[nick1udwig]

lgtm

in #38 you note other bad places. Would you prefer to address those here or in another PR?

[jurij-jukic]

process_lib/src/hyperapp.rs:280 and process_lib/src/hyperapp.rs:305 assume every non-success payload is a SendError, panicking on corrupt or unexpected responses instead of bubbling a decode failure.

This one is not explicitly addressed. This is outdated. Errors are surfaced cleanly in send and send_rmp, there are no panics.