feat: store machine id on connection entries in Uncloud config so it can be removed with machine (#182)

* fix: Store machine id on connection entries so it can be removed when machine is

* Add "GetContextOverrideOrCurrent" helper method to cli and use in `uc machine rm` to clean up connections

internal/cli/config/connection.go

@@ -25,6 +25,7 @@ type MachineConnection struct {
 	TCP       *netip.AddrPort `yaml:"tcp,omitempty"`
 	Host      string          `yaml:"host,omitempty"`
 	PublicKey secret.Secret   `yaml:"public_key,omitempty"`
+	MachineID string          `yaml:"machine_id,omitempty"`
 }
 
 func (c MachineConnection) String() string {

internal/cli/config/connection_test.go

@@ -58,6 +58,15 @@ func TestMachineConnection_String(t *testing.T) {
 			conn: MachineConnection{},
 			want: "unknown connection",
 		},
+		{
+			name: "ssh connection with machine id",
+			conn: MachineConnection{
+				SSH:       "user@host.com",
+				MachineID: "ed98b9f7575308c340263cd279e3b568",
+			},
+			// String() does not use MachineID; just verifying entry with it is valid
+			want: "ssh://user@host.com",
+		},
 	}
 
 	for _, tt := range tests {