Align lend amount types with swap pattern

[its-applekid]

Summary

Aligns lend module type patterns with the swap module's consistent input/output amounts, resolving issue #303.

Closes #303

Changes

SDK Types

• LendTransaction: Added amountRaw: bigint, changed amount from bigint to number (human-readable)
• LendMarketPosition: Changed balance/shares from bigint to number, added balanceRaw/sharesRaw
• LendClosePositionParams: Renamed amount: bigint → amountRaw: bigint for consistency

Providers

• Morpho provider: Updated _openPosition, _closePosition, _getPosition to return human-readable amounts/balances
• Aave provider: Same updates across all position methods (ETH and ERC-20)
• LendProvider core: Updated closePosition to use amountRaw parameter

Principle

Developers pass human-readable numbers in, receive human-readable numbers out with the same field names. Raw bigint values are always suffixed with Raw.

Verification

• ✅ SDK builds successfully
• ✅ All 449 tests pass (52 test files, 10 skipped)
• ✅ No lint errors

Breaking Changes

This is a breaking change to the public API:

• LendTransaction.amount is now number instead of bigint
• New LendTransaction.amountRaw field for raw bigint values
• LendMarketPosition.balance/shares are now number instead of bigint
• New LendMarketPosition.balanceRaw/sharesRaw fields
• LendClosePositionParams.amount renamed to amountRaw

[netlify]

👷 Deploy request for actions-ui pending review.

Visit the deploys page to approve it

Name	Link
🔨 Latest commit	81c997f

[jefr90]

Thanks. Closing in favor of #347.