Add support for BumpFootprintExpirationOperation and RestoreFootprintOperation Responses.

[overcat]

What problem does your feature solve?

BumpFootprintExpirationOperation and RestoreFootprintOperation are newly introduced operations in the Protocol Soroban, and we need to add corresponding support for them.

What would you like to see?

• Allow users to construct transactions that include these two operations.
• The server needs to be able to parse these two operations correctly. (protocol)

What alternatives are there?

None

Estimated working hours: 6

[sreuland]

I updated the title to narrow the scope to just supporting response models. The TransactionBuilder and TxSub aspects of these ops will need a new ticket created like 'Support TxSub for Invoke/Bump/Restore', and that will require soroban rpc integration and new flows for assembling transactions with preflight response data for setting tx footprint, fees. the js sdk, js-soroban-client, has gone through this enhancement for submitting tx's with these ops and preflighting, which can be used as a reference - stellar/js-soroban-client#108

[overcat]

Implemented in #491.