Add raito-cairo-args crate for Cairo/Scarb runner argument serialization

[maciejka]

• Custom Serde serializer for Cairo types and felts:
• Support for various data types including u256, byte arrays, and 64-hex digests
• Integration with Scarb runner argument format
• Specialized adapters for Raito project types

[maciejka]

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This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• Run proving in ephemeral spot instance #386
• Drive proving with rust #385
• Add raito-cairo-args crate for Cairo/Scarb runner argument serialization #384 👈 (View in Graphite)
• Use Stwo-cairo from main #378
• Fix typo #382 : 2 other dependent PRs (#375 , #381 )
• main

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[m-kus]

Niiiice 🤌