add todo document

Author: MattEdwardsWaggleBee

docs/.todo.md

@@ -0,0 +1,4 @@
+# Things TODO
+
+- Reenable CodeQL for the project once there is support for .NET 9
+  

docs/docs.projitems

@@ -9,6 +9,7 @@
     <Import_RootNamespace>docs</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
+    <None Include="$(MSBuildThisFileDirectory).todo.md" />
     <None Include="$(MSBuildThisFileDirectory)additional-classes.md" />
     <None Include="$(MSBuildThisFileDirectory)index.md" />
     <None Include="$(MSBuildThisFileDirectory)jsonpatch.md" />
@@ -23,4 +24,4 @@
   <ItemGroup>
     <Content Include="$(MSBuildThisFileDirectory)_includes\nav_footer_custom.html" />
   </ItemGroup>
-</Project>
+</Project>