refactor(gnolang): move Exception to frame.go (#3596)

minor refactor, just to put it in a place which I think is more
appropriate rather than being at the very top of the machine.go file.

gnovm/pkg/gnolang/frame.go

@@ -216,3 +216,30 @@ func toConstExpTrace(cte *ConstExpr) string {
 
 	return tv.T.String()
 }
+
+//----------------------------------------
+// Exception
+
+// Exception represents a panic that originates from a gno program.
+type Exception struct {
+	// Value is the value passed to panic.
+	Value TypedValue
+	// Frame is used to reference the frame a panic occurred in so that recover() knows if the
+	// currently executing deferred function is able to recover from the panic.
+	Frame *Frame
+
+	Stacktrace Stacktrace
+}
+
+func (e Exception) Sprint(m *Machine) string {
+	return e.Value.Sprint(m)
+}
+
+// UnhandledPanicError represents an error thrown when a panic is not handled in the realm.
+type UnhandledPanicError struct {
+	Descriptor string // Description of the unhandled panic.
+}
+
+func (e UnhandledPanicError) Error() string {
+	return e.Descriptor
+}

gnovm/pkg/gnolang/machine.go

@@ -16,30 +16,6 @@ import (
 	"github.com/gnolang/gno/tm2/pkg/store"
 )
 
-// Exception represents a panic that originates from a gno program.
-type Exception struct {
-	// Value is the value passed to panic.
-	Value TypedValue
-	// Frame is used to reference the frame a panic occurred in so that recover() knows if the
-	// currently executing deferred function is able to recover from the panic.
-	Frame *Frame
-
-	Stacktrace Stacktrace
-}
-
-func (e Exception) Sprint(m *Machine) string {
-	return e.Value.Sprint(m)
-}
-
-// UnhandledPanicError represents an error thrown when a panic is not handled in the realm.
-type UnhandledPanicError struct {
-	Descriptor string // Description of the unhandled panic.
-}
-
-func (e UnhandledPanicError) Error() string {
-	return e.Descriptor
-}
-
 //----------------------------------------
 // Machine