feat: ether transfer modal on swap station

[heronlancellot]

Feature Request

Describe the Feature Request

Definition of done:

• [x] Add Modal to add the native ether on Swap Station
• [x] Check the design to click and open a modal to add the amount of ether

Describe Preferred Solution

• Check the Design to create the modal

Related Code

SwapStation.tsx

Additional Context

The amount of ether added will be updated in Context and will be passed to the Swaplace Contract. For now it's hardcoded 0n, will have the amount we will set in the modal.

[heronlancellot]

Closed by #387