fix(website): Correctly matching function inputs in ABI when signing a transaction

[nicosampler]

This fix addresses the issue in #411, where the code was incorrectly retrieving the first matching function inputs from the ABI. Now, it selects the function inputs by matching the function name and the exact count of arguments specified in the decodedFunctionData.

• All the anys have been removed from DisplayedTransaction.tsx.
• I've refactored the code a bit, especially renaming some variables to make it more understandable.

Closes https://linear.app/usecannon/issue/CAN-411/website-displays-wrong-function-when-same-name-on-sign-transaction

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Latest commit: 5993b93bbf73b4981edec654bdd97e68c8a4faed

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