chore: update ShellUI version to 0.3.0 and set version suffix to alpha.1 in Directory.Build.props

Author: Shewart

Directory.Build.props

@@ -2,8 +2,8 @@
 <Project>
   <!-- Centralized ShellUI Version - Update this single file to version all components -->
   <PropertyGroup>
-    <ShellUIVersion>0.2.0</ShellUIVersion>
-    <ShellUIVersionSuffix></ShellUIVersionSuffix>
+    <ShellUIVersion>0.3.0</ShellUIVersion>
+    <ShellUIVersionSuffix>alpha.1</ShellUIVersionSuffix>
   </PropertyGroup>
 
   <!-- Common properties for all ShellUI projects -->