Feeding LFC the JSON via stdin

[tanneberger]

JSON via Stdin

We currently pass JSON using the --json={} option, but it would be cleaner to use stdin.

Steps

• modify lingo to give lfc properties via stdin @revol-xut
• modify lfc to receive via stdin @lhstrh

[tanneberger]

This is not relevant anymore we agreed that we ignore the problem and say that lingo only will work with the non gradle lfc version

[lhstrh]

I still think that it's worth doing this because it is cleaner than passing JSON as CLI args...

[tanneberger]

@lhstrh Do we want this in lingo v0.2?

[lhstrh]

Sure!

[tanneberger]

How is the lfc site of things doing ?

[lhstrh]

I'm working on it. Still chasing down mysterious bugs: https://github.com/lf-lang/lingua-franca/actions/runs/6369165649

I will add more robust handling of the JSON as well...