Expose the MASM implementation of the basic wallet to be reused in the user's account code

[greenhat]

The MASM implementation is defined in https://github.com/0xPolygonMiden/miden-base/blob/6f541003f3250a779dafa18572ca9e7f8739ffad/miden-lib/asm/miden/contracts/wallets/basic.masm#L1-L111

The naive approach would be to expose them in miden-sdk crate as we do with tx kernel functions and stdlib. The functions are written with the expectation of being called. Although I don't see anything in their implementation that prevents them to be execed we plan to introduce strict rules encoded in the function attributes so this approach(execing) might break in the future.