Delay unilateral exit and support send to onchain address (#117)

* add delay on redeem close + forfeit close

* increase default round lifetime (16 minutes min)

* add sequence to final pset

* update CLI and server to support delayed vtxos oncahin

* rename future to "locked"

* add configurable EXIT_DELAY variable

* renaming

* rename "close" --> "closure"

* rename "close" to "closure"

* error message config.go

client/client.go

@@ -75,7 +75,7 @@ func getClientFromState(ctx *cli.Context) (arkv1.ArkServiceClient, func(), error
 	if err != nil {
 		return nil, nil, err
 	}
-	addr, ok := state["ark_url"]
+	addr, ok := state["ark_url"].(string)
 	if !ok {
 		return nil, nil, fmt.Errorf("missing ark_url")
 	}