feat(money-account-utils): add money account transaction batch builders

[Jwhiles]

Explanation

Stacked on #9397.

Ports the Money Account deposit and withdrawal transaction batch builders from metamask-mobile (app/components/UI/Money/utils/moneyAccountTransactions.ts) into this package, so mobile and extension encode the vault calls identically rather than each keeping its own copy.

What moved: the ABIs, the calldata encoders, the slippage and share arithmetic, the mUSD deposit-asset resolution, and the two contract reads (previewDeposit on the lens, getRate on the accountant).

What deliberately did not move: the four client wrappers (updateMoneyAccountDepositTokenAmount, updateMoneyAccountWithdrawTokenAmount, getMoneyAccountDepositTransactionsData, getMoneyAccountWithdrawTransactionsData). Those read vault config, provider and recipient from mobile's Redux/Engine singletons and return a Confirmations-owned type, so they stay in the client and delegate to these builders.

Signatures are unchanged from mobile, including the injected provider, so client call sites only change their import path. @ethersproject/{abi,abstract-provider,contracts} v5 is used directly rather than the ethers umbrella, matching the convention already established by money-account-balance-service (which reads the same lens and accountant contracts).

References

N/A

Checklist

• I've updated the test suite for new or updated code as appropriate (100% coverage maintained)
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and ensured that new or referenced constants are available in those clients

🤖 Generated with Claude Code

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Note

Medium Risk
Changes how on-chain deposit/withdraw batches are encoded and rounded; mistakes could cause failed txs or incorrect minima, though behavior is aligned with the prior mobile implementation and heavily tested.

Overview
Centralizes Money Account deposit and withdraw transaction encoding in @metamask/money-account-utils (ported from MetaMask Mobile) so clients share one implementation instead of duplicating vault calldata.

buildMoneyAccountDepositBatch returns an mUSD approve + teller deposit pair: it reads previewDeposit on the lens, sets minimumMint with 0.2% slippage, and can omit calldata via initialiseWithoutData or skip RPC for zero-amount placeholders. buildMoneyAccountWithdrawBatch returns teller withdraw (to the money account) plus mUSD transfer to the recipient, using getRate and getSharesForWithdrawal with ceiling division (plus minimumAssets = amount - 1) to avoid MinimumAssetsNotMet reverts from rounding.

Also exports helpers (applySlippage, deposit asset address/id resolution, TELLER_ABI, batch types) and adds @ethersproject contract dependencies with Jest coverage.

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