feat!: make functions return Result and implement Node Killer

[Salka1988]

Refactored functions to return Result for better error handling.

• launch_provider_and_get_wallet()
• launch_custom_provider_and_get_wallets()
• setup_test_provider()
• setup_test_client()

I've implemented FuelService and added support for the fuel_core_services::Service trait. This allows us to have finer control over the behavior of FuelNode;

pub struct FuelService {
    #[cfg(feature = "fuel-core-lib")]
    service: CoreFuelService,
    #[cfg(not(feature = "fuel-core-lib"))]
    service: BinFuelService,
    bound_address: SocketAddr,
}

Checklist

• I have added necessary labels.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[hal3e]

Thanks for the nice refactor and devX improvement!

[segfault-magnet]

This is going to break every test out there. It should definitely be fixed while we have the time, my thinking is just whether we want to make some more changes to this so that we may at least have something more to show for it besides better panic handling.

For example, one thing we've been putting off for so long is the ability to kill the spawned node. Useful when users want to test the behavior of their app when the node is down.

Currently, they need to kill the tokio runtime since a handle was hidden somewhere inside that keeps the node alive.

Ideally, we'd ship this out with that feature (and maybe any other pressing ones) and at least make a feature-rich-breaking change.

@FuelLabs/sdk-rust

[Salka1988]

This is going to break every test out there. It should definitely be fixed while we have the time, my thinking is just whether we want to make some more changes to this so that we may at least have something more to show for it besides better panic handling.

For example, one thing we've been putting off for so long is the ability to kill the spawned node. Useful when users want to test the behavior of their app when the node is down.

Currently, they need to kill the tokio runtime since a handle was hidden somewhere inside that keeps the node alive.

Ideally, we'd ship this out with that feature (and maybe any other pressing ones) and at least make a feature-rich-breaking change.

@FuelLabs/sdk-rust

I could do it in this PR, but I think it is better to make a new PR. I will do as @FuelLabs/sdk-rust decides. Anyway, I'm going to start implementing the spawned node killer.

[hal3e]

I like the way this looks now! I have some change requests though...

[hal3e]

Great work!