Define intial configuration values

[kanej]

Currently we have the framework for Hardhat configuration, but we have not specified its default values (e.g. contract folder, test folder etc).

The v2 config type is defined here: https://github.com/NomicFoundation/hardhat/blob/739d593d46123c6584de10c7bc5fce10bae4b9e2/packages/hardhat-core/src/types/config.ts#L284-L290

This task should be limited to adding the type and populating the values on initialization:

• paths
• solidity

networks will wait for the network adapter work.

[kanej]

We can do paths now, but we don't have clarity on the rest yet.

[kanej]

We have enhanced the configuration in a piece meal fashion. I am closing this issue.