Add Integration Test for Stellar Asset Contract (#1809)

[guptapratykshh]

Description

This PR adds comprehensive JavaScript integration test for the Stellar Asset Contract. The test demonstrates how to interact with the contract on the Stellar Soroban testnet, covering deployment, invocation, transfers, approvals, error handling, and edge cases.

Fixes #1809

Test Coverage -

• Balance queries
• Token transfers between accounts
• Approvals and transferFrom operations
• Error handling for invalid operations
• Edge cases
• Multiple rapid transfers
• All secrets and contract IDs are read from files, not hardcoded

[guptapratykshh]

@salaheldinsoliman

[salaheldinsoliman]

@guptapratykshh Soroban integration tests are failing, could you make sure they pass by running them locally first?
The steps for running and preparing the tests are in integration/soroban/package.json.
You should run:

npm install
npm run build
npm run setup
npm run test

[salaheldinsoliman]

@guptapratykshh I have done some re-writing for the soroban integration test, since the protocol 23 release.
Could you take another look at this one please?

[salaheldinsoliman]

Hi @guptapratykshh, the soroban integration tests is failing, could you please re-check that?

[salaheldinsoliman]

@guptapratykshh looks good 👍
It is missing a DCO check, can you sign the commits please?
Check: https://github.com/hyperledger-solang/solang/pull/1815/checks?check_run_id=55496655096

[guptapratykshh]

Please look into this . @salaheldinsoliman