fix(vnext-template): pch include dirs (#14806)

* fix(vnext-template): add additional include dirs for submodules

* Change files

* fix(vnext-template): add includes for cpp-lib pch

Author: frankcalise

change/react-native-windows-41760bd2-4285-44fd-b37d-01df6f5082e2.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "fix(vnext-template): add additional include dirs for submodules",
+  "packageName": "react-native-windows",
+  "email": "fcalise@gmail.com",
+  "dependentChangeType": "patch"
+}

vnext/templates/cpp-app/windows/MyApp/MyApp.vcxproj

@@ -75,6 +75,10 @@
       <SDLCheck>true</SDLCheck>
       <AdditionalOptions>%(AdditionalOptions) /bigobj</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
+      <AdditionalIncludeDirectories>
+        $(MSBuildThisFileDirectory);
+        %(AdditionalIncludeDirectories)
+      </AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <AdditionalDependencies>shell32.lib;user32.lib;windowsapp.lib;%(AdditionalDependenices)</AdditionalDependencies>

vnext/templates/cpp-lib/windows/MyLib/MyLib.vcxproj

@@ -80,6 +80,10 @@
       <PreprocessorDefinitions>_WINRT_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalUsingDirectories>$(WindowsSDK_WindowsMetadata);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
       <LanguageStandard>stdcpp20</LanguageStandard>
+      <AdditionalIncludeDirectories>
+        $(MSBuildThisFileDirectory);
+        %(AdditionalIncludeDirectories)
+      </AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <AdditionalDependencies>shell32.lib;user32.lib;windowsapp.lib;%(AdditionalDependenices)</AdditionalDependencies>