refactor: compose swap on the factory is not necessary as it can be delegate to the implementer

[0xneves]

It's currently being used by the tests of swaplace, thus the need to create a utils.ts script to compose the swaps using typescript and then call it on the test files.

• Delete all about composing swaps in the SwapFactory.
• Forge utils file to aid swap making in tests
• Update all tests previously using composeSwap
• @edit add virtual keyword to the function in the SwaplaceFactory

[0xneves]

Adding a refactor on setting the makeAsset and makeSwap functions into virtual for possible override by the implementer.

[0xneves]

I'm rushing this as it interferes with more issues that need to be executed

[0xneves]

Instead of utils.ts, SwapFactory.ts should be better, this would separate the logic for composing swaps in a file and the general utilities in the other one.