Use prefix in exposed file name

[RenanSouza2]

Hello @frangio, I made this PR to be able to use hardhat-exposed with a hardhat typescript project

[frangio]

Can you describe the problem and how this fixes it?

This is technically a breaking change because it would break scripts that load artifacts using the fully qualified name contracts-exposed/A.sol:$A.

[RenanSouza2]

Typechain doesn't accept two files with the same name

Using the prefix in the file would fix that

I was thinking about closing this pr for two reasons tbh:

• there is a bug in typechain when a file starts with $
• typechain is deprecated and they recommend using viem, some testing I did show that viem accept files with the same name

About the breaking change I thought in maybe only using the prefix if the user sets one, would still be breaking but only if there is a set prefix but somewhat better

Let me know what you think

[frangio]

there is a bug in typechain when a file starts with $

This seems like a dealbreaker. I'm sad that Typechain is deprecated but given that I agree it might be better to close this.