Script to bridge TUS -> AVAX

[EugeneTeu]

Considering subnet coming in for idle game, we might want to have scripts to automate the following:

Scenario 1

1. bridge TUS out of subnet EVM -> c-chain
2. Swap TUS -> Avax on c-chain

Scenario 2

1. Swap TUS directly on subnet EVM

I'm thinking that we likely will need to do scenario 1 since swimmer subnet might not have a DEX + i believe native currency on swimmer will be TUS. This might be useful for people who wants to sell TUS to cover gas / ROI

[coccoinomane]

For reference, an update on this topic:

• @EugeneTeu kindly implemented the swap feature in add tus swap to avax via pangolin #80.
• The feature will not be implemented in crabada.py, because it is outside of its scope.