[Peek] Window improvements (#26924)

* add min window size

* addd tool tip

* add more tool tips

* update window size and comment

* remove comment

src/modules/peek/Peek.UI/MainWindow.xaml

@@ -10,6 +10,8 @@
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:views="using:Peek.UI.Views"
     xmlns:winuiex="using:WinUIEx"
+    MinWidth="450"
+    MinHeight="400"
     mc:Ignorable="d">
     <Window.SystemBackdrop>
         <MicaBackdrop />