Finish RLP

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 48.42105% with 49 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@a33d5c2). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
cairo/ethereum/rlp.cairo	48.42%	49 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #118 +/- ## ======================================= Coverage ? 76.76% ======================================= Files ? 39 Lines ? 4618 Branches ? 0 ======================================= Hits ? 3545 Misses ? 1073 Partials ? 0 ```

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