Feat rebase mecanism

[julienbrs]

closes #38

• Users are now minting and holding shares of the total supply
• In project.cairo, balance still returns the carbon_credits amount and not the shares thanks to the share_to_cc function.
• erc1155 abi isn't embed anymore => reimplementation of all the functions in the project.cairo to keep compatibility.

/!\ Because internal balance is now using shares of supply, but the balance used by users are cc tokens, we need to use converters like cc_to_share and share_to_cc. There are rounding errors that needs to be solved, will be done in an other PR.

[julienbrs]

New rebase design has to be made to keep track of failed CC