Implement simulate_transaction method in SorobanRpcClient

[Emrys02]

Soroban requires transactions to be simulated locally on the node first to determine exact resource costs/fees before actual submission.

Implementation Guidelines

Key Files: crates/core/src/network/rpc.rs.

• Add async fn simulate_transaction(&self, tx_xdr: &str) firing the simulateTransaction RPC method.

Expectations

What done looks like: Developers can accurately dry-run transactions and fetch required footprint/auth payload data.

For any question, reach me on Discord: emry_ss

[Sendi0011]

@Sendi0011 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Gm team, i will like to work on this, i am a frontend/smartcontract developer with experience skill solving issues like this. i am also an active Open source contributor.
ETA: 5hours

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Sendi0011 to this issue.

[drips-wave]

Congratulations, @Sendi0011! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Sendi0011: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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