Replace app icon with LlamaCasty brand figure

- Assets/llamacasty-icon.png: new brand llama figure (no text)
- Assets/llamacasty-icon.ico: converted from PNG for executable
- Assets/llamacasty-logo.jpg: full logo with text
- ytLive.csproj: updated ApplicationIcon and Resource references
- All XAML windows: updated Icon references to new file

ytLive.csproj

@@ -7,7 +7,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWPF>true</UseWPF>
     <EnableWindowsTargeting>true</EnableWindowsTargeting>
-    <ApplicationIcon>Assets\tyllive-icon.ico</ApplicationIcon>
+    <ApplicationIcon>Assets\llamacasty-icon.ico</ApplicationIcon>
     <AssemblyName>ytLive</AssemblyName>
     <RootNamespace>ytLive</RootNamespace>
   </PropertyGroup>
@@ -20,7 +20,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Resource Include="Assets\tyllive-icon.png"/>
+    <Resource Include="Assets\llamacasty-icon.png"/>
+    <Resource Include="Assets\llamacasty-logo.jpg"/>
     <Resource Include="Assets\ytLlive-logo.png"/>
   </ItemGroup>