Auto-detect virtual env

[rjnrohit]

Remove user overhead to mention virtual environment directory

[swapnilraj]

Adding to this auto-add the starknet devnet configuration to hardhat.config.ts if not present.
@JorikSchellekens can it be shimmed at runtime or we can write a module that reads modifies the hardhat config to add this

[JorikSchellekens]

There's no clean way to do this that would work for all users. The closest is to set the docker by default

[rjnrohit]

we can check if $VIRTUAL_ENV is set