Feat: noname cli: read input/output JSON from file

[ibkisthere]

Closes #92
There's a lot of changes - i'll briefly summarize what i did

• I added a way to parse JSON files to the noname-cli , following the second option on noname cli: read input/output JSON from file  #92 , it first tries to parse json, if it can not we will try parse as file path.
• if the path/ file is invalid (it does not exists, or it is a directory) it panics immediately and shows an error message on the console
• added 2 more Error types to the ParsingError Enum for the invalid path/ file does not exist error and path is directory
• added an inputs folder and two folders under it for testing valid and invalid json public_inputs and private_inputs

Here are some example commands to test the new changes to the cli

cargo run test --backend r1cs-bn254 --path examples/arithmetic.no --private-inputs '{"private_input": "2"}' --public-inputs '{"public_input": "2"}' --debug

cargo run test --backend r1cs-bn254 --path examples/arithmetic.no --private-inputs examples/json/inputs1/private_input.json --public-inputs examples/json/inputs1/public_input.json --debug

[mimoo]

this is great, thanks! The only problem that I see is that we're not making use of the examples/json/* files right? Maybe we should have a test to exercise that path?

[ibkisthere]

Oh i understand you , i only tested the inputs manually by writing commands to the paths to the files, i didn't write actual tests , i'm just seeing a test folder in the repo just now, i can do that.

[mimoo]

we ended up merging this one: #111 but if you want to add your comments to the CLI usage that would still be great!

[ibkisthere]

Will do !

[mimoo]

I'll close this one for now!