Add multi-mint swap to CLI and API (#212)

* Add multi-mint swap to CLI and API

* Add confirmation prompt to CLI

* Replace several assert statements

* Define response for API endpoint swap

* Adapt to latest changes on main

* Fix: missing argument after latest changes on main

* API: use local wallet for swap

* Improve swap command

* clean up cli swap

* fix comment

* clean up router

* fix up

* remove outgoing

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Co-authored-by: callebtc <93376500+callebtc@users.noreply.github.com>

cashu/wallet/api/responses.py

@@ -17,6 +17,13 @@ class InvoiceResponse(BaseModel):
     hash: Optional[str] = None
 
 
+class SwapResponse(BaseModel):
+    outgoing_mint: str
+    incoming_mint: str
+    invoice: Invoice
+    balances: Dict
+
+
 class BalanceResponse(BaseModel):
     balance: int
     keysets: Optional[Dict] = None