app/window,app/internal/window: allow min/max window size

The app.MinSize and app.MaxSize options restricts the window size:

w := app.NewWindow(
	app.Size(unit.Dp(600), unit.Dp(596)),
	app.MinSize(unit.Dp(600), unit.Dp(596)),
	app.MaxSize(unit.Dp(600), unit.Dp(596)),
	app.Title(APPNAME),
)

Signed-off-by: Jason <sourcehut@sweatyballs.es>

app/window.go

@@ -427,4 +427,32 @@ func Size(w, h unit.Value) Option {
 	}
 }
 
+// MaxSize sets the maximum size of the window.
+func MaxSize(w, h unit.Value) Option {
+	if w.V <= 0 {
+		panic("width must be larger than or equal to 0")
+	}
+	if h.V <= 0 {
+		panic("height must be larger than or equal to 0")
+	}
+	return func(opts *window.Options) {
+		opts.MaxWidth = w
+		opts.MaxHeight = h
+	}
+}
+
+// MinSize sets the minimum size of the window.
+func MinSize(w, h unit.Value) Option {
+	if w.V <= 0 {
+		panic("width must be larger than or equal to 0")
+	}
+	if h.V <= 0 {
+		panic("height must be larger than or equal to 0")
+	}
+	return func(opts *window.Options) {
+		opts.MinWidth = w
+		opts.MinHeight = h
+	}
+}
+
 func (driverEvent) ImplementsEvent() {}