feat: chain swaps cli

[jackstar12]

No description provided.

[kilrau]

createswap & createchainswap parity:

• to be in line with behavior of createchainswap, createswap should also print help output instead of starting an "any amount" swap process when called without args. It even says --any-amount is (default: false) but well that's not true
• boltzcli createswap --any-amount defaults to mainchain, the --currency arg should NOT be optional and print help output. If you absolutely want to default, default to Liquid and remove the --liquid flag.
• I don't get why createswap has --internal-send AND --wallet. --internal-send sounds very vague and confusing so let's get rid of it and stick with --from-wallet & --to-wallet everywhere, just like in createchainswap. It's desirable that the user specifies which wallet to use and not automagically choose.
• createchainswap should have the --any-amount feature too
• There should be examples in both help outputs for --any-amount
• I like --to-external better to be in line with --from-external. Help output tells me that one has to be a currency, one an address

Adding more later

[jackstar12]

[ ] to be in line with behavior of createchainswap, createswap should also print help output instead of starting an "any amount" swap process when called without args. It even says --any-amount is (default: false) but well that's not true

This isnt supported by the backend yet.

[ ] I don't get why createswap has --internal-send AND --wallet. --internal-send sounds very vague and confusing so let's get rid of it and stick with --from-wallet & --to-wallet everywhere, just like in createchainswap. It's desirable that the user specifies which wallet to use and not automagically choose.

internal-send is currently useful for clients who dont care about any wallet stuff, e.g. RTL.
But it should be external-pay in the cli for consistency.

[kilrau]

Looking good