refactor(abi): move privacy and name from `FunctionSignature` to `FunctionInfo`

[baszalmstra]

Current the FunctionSignature contains this information. We need to move that to FunctionInfo.

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• claim this issue (assign yourself or comment below)
• implement the feature and start a Pull Request with in the description: closes refactor(abi): move privacy and name from FunctionSignature to FunctionInfo #146.

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[attila-lin]

I'd like to take it.

[baszalmstra]

Ah thats super good to hear! Welcome :)

However, I forgot to update this issue, we've already done this in #166 :(