feat(bindings-ts): support multi-auth workflows

- add `atomic_swap` and `token` contracts from
  https://github.com/stellar/soroban-examples to `test-wasms`
- greatly complicate `ts-tests/package.json` to deploy & generate
  bindings for these new contracts, plus creating an `alice` identity
  and minting separate amounts of two separate tokens to the `root` user
  and `alice`
- add tests for atomic swap functionality inspired by
  https://github.com/stellar/soroban-react-atomic-swap
- let this logic guide needed updates to `bindings typescript`-generated
  libraries:
  - don't return flat values
  - instead, always return an object which will have at least a
    `txUnsigned` and `simulation` key
  - object contains all possibly-relevant fields from the logic it
    performs

Co-authored-by: Aristides Staffieri <aristides.staffieri@stellar.org>

Cargo.toml

@@ -47,6 +47,11 @@ version = "20.0.0-rc2"
 git = "https://github.com/stellar/rs-soroban-sdk"
 rev = "0992413f9b05e5bfb1f872bce99e89d9129b2e61"
 
+[workspace.dependencies.soroban-token-sdk]
+version = "20.0.0-rc2"
+git = "https://github.com/stellar/rs-soroban-sdk"
+rev = "0992413f9b05e5bfb1f872bce99e89d9129b2e61"
+
 [workspace.dependencies.soroban-ledger-snapshot]
 version = "20.0.0-rc2"
 git = "https://github.com/stellar/rs-soroban-sdk"