Add EVM TypeScript vault depositor SDK

[ihsraham]

Summary

As decided, this PR is EVM-only. It adds the TypeScript SDK surface for EVM vault deposits and deposit verification, with native ETH and ERC-20 flows.

Changes

• Added the ESM TypeScript package entrypoint, shared result/error types, and EVM vault depositor implementation.
• Added native ETH and ERC-20 deposit handling with strict input validation, chain checks, receipt handling, and stable error codes.
• Added unit tests, Anvil integration tests, TypeScript CI wiring, and npm package/build checks.
• Added a local EVM deposit demo UI for wallet-based submit and verify flows.

Demo

Checks

• npm run typecheck
• npm test
• npm run build
• npm --workspace @yellow-org/evm-deposit-demo run build
• npm run test:integration:evm
• npm audit --audit-level=low
• npm pack --dry-run
• git diff --check

[philanton]

I think it'd be better to have everything related to ts under sdk/ts like in nitrolite

[ihsraham]

Addressed in 127f318: moved the TS SDK package, tests, lockfile, and demo under sdk/ts, with CI updated to run from there.

[dimast-x]

Feel free to merge once @philanton approves

[philanton]

you can add it as dependency to Make file as well)

[ihsraham]

Updated in 37ceff2: make integration now depends on ts-deps, which runs npm --prefix sdk/ts ci, and the README no longer asks users to run it separately.