[FEATURE] avoid multi-purposing FunctionCall in aztec.js #18789
Description
Problem Statement
FunctionCall is used for multiple purposes, it is used as an FFI type, which mirrors FunctionCall in Noir, also it is used to represent contract function call in SDK. FFI type is just a mirror type, don't use it for other purpose. The reason is that on Noir side it may change, also ideally FFI types can be auto generated. Before having a generator, one can manually create a noir type TS module which exposes all these FFI types.
Another reason is that the FunctionCall in Noir is just one implementation of account contract, user can completely not use FunctionCall.
Proposed Solution
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Example Use Case
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Alternative Solutions
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Additional Context
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