[ENHANCE] - Added Theme to Name Space [Owner].Theme.[Theme]

changes all template files to conform to  [Owner].Theme.[Theme]

Oqtane.Server/wwwroot/Themes/Templates/External/Package/[Owner].Theme.[Theme].nuspec

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata>
+    <id>[Owner].Theme.[Theme]</id>
+    <version>1.0.0</version>
+    <authors>[Owner]</authors>
+    <owners>[Owner]</owners>
+    <title>[Theme]</title>
+    <description>[Description]</description>
+    <copyright>[Owner]</copyright>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <license type="expression">MIT</license>
+    <projectUrl>https://github.com/oqtane/oqtane.framework</projectUrl>
+    <icon>icon.png</icon>
+    <tags>oqtane theme</tags>
+    <releaseNotes></releaseNotes>
+    <summary></summary>
+    <dependencies>
+      <dependency id="Oqtane.Framework" version="[FrameworkVersion]" />
+    </dependencies>
+  </metadata>
+  <files>
+    <file src="..\Client\bin\Release\net7.0\[Owner].Theme.[Theme].Client.Oqtane.dll" target="lib\net7.0" /> 
+    <file src="..\Client\bin\Release\net7.0\[Owner].Theme.[Theme].Client.Oqtane.pdb" target="lib\net7.0" /> 
+    <file src="..\Client\wwwroot\**\*.*" target="wwwroot" /> 
+    <file src="icon.png" target="" />
+  </files>
+</package>