Rename package to OpenMaui.Controls.Linux

- Changed package ID from Microsoft.Maui.Controls.Linux to OpenMaui.Controls.Linux
- Updated all project files, namespaces, and documentation
- Renamed template from maui-linux to openmaui-linux
- Updated NuGet badges and install commands
- Maintained MarketAlly LLC as owner/author

Package: OpenMaui.Controls.Linux
Template: OpenMaui.Linux.Templates
Install: dotnet add package OpenMaui.Controls.Linux --prerelease

templates/openmaui-linux-app/MainPage.cs

@@ -0,0 +1,64 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Graphics;
+
+namespace OpenMauiLinuxApp;
+
+public class MainPage : ContentPage
+{
+    private int _count = 0;
+    private readonly Label _counterLabel;
+
+    public MainPage()
+    {
+        Title = "OpenMauiLinuxApp";
+
+        _counterLabel = new Label
+        {
+            Text = "Click the button",
+            HorizontalOptions = LayoutOptions.Center,
+            FontSize = 18
+        };
+
+        var button = new Button
+        {
+            Text = "Click me",
+            HorizontalOptions = LayoutOptions.Center
+        };
+        button.Clicked += OnCounterClicked;
+
+        var image = new Image
+        {
+            Source = "dotnet_bot.png",
+            HeightRequest = 200,
+            HorizontalOptions = LayoutOptions.Center
+        };
+
+        Content = new VerticalStackLayout
+        {
+            Spacing = 25,
+            Padding = new Thickness(30, 0),
+            VerticalOptions = LayoutOptions.Center,
+            Children =
+            {
+                new Label
+                {
+                    Text = "Hello, .NET MAUI on Linux!",
+                    FontSize = 32,
+                    HorizontalOptions = LayoutOptions.Center
+                },
+                image,
+                _counterLabel,
+                button
+            }
+        };
+    }
+
+    private void OnCounterClicked(object? sender, EventArgs e)
+    {
+        _count++;
+        _counterLabel.Text = _count == 1 ? "Clicked 1 time" : $"Clicked {_count} times";
+    }
+}