fix(purity): remove submitDirectly

[Sabnock01]

This PR depends on #19

Overview

For the first curta-golf course, it was possible for solvers to get a block's PREVRANDAO value in the same transaction that they submit their solution by using submitDirectly. Therefore, this PR will deprecate the function in which all solvers will need to use the commit-reveal scheme provided by commit + submit. This is not vulnerable to the above method since any call to submit will check that block.timestamp has been increased by at least 60 before calls to submit succeed, ensuring that a solver's call to submit cannot come in the same block as the call to commit.

Fixes

ICurtaGolf.sol

• Removes the submitDirectly function signature.

CurtaGolf.sol

• Removes the submitDirectly function.

CurtaGolf.t.sol

• Removes the tests for submitDirectly.
• Modifies the test test_tokenURI_MintedToken_Succeeds to use commit + submit.

PrintKingArt.s.sol

• setUp has been modified to use the commit + submit method instead of submitDirectly.
• This file was also missing the RECIPIENT constant present in PrintParArt.s.sol and has been added.

PrintParArt.s.sol

• setUp has been modified to use the commit + submit method instead of submitDirectly.