fix MSVC solution: add missing documentation files to project

Author: kolomenkin

LogReader.vcxproj

@@ -192,7 +192,8 @@
     <None Include=".github\workflows\build.yml" />
     <None Include=".github\workflows\codeql-analysis.yml" />
     <None Include=".gitignore" />
-    <None Include="docs\solution-notes-letter.ru.md" />
+    <None Include="docs\implementation-notes-letter.md" />
+    <None Include="docs\implementation-notes-letter.ru.md" />
     <None Include="docs\task-description.md" />
     <None Include="LICENSE" />
     <None Include="Makefile" />

LogReader.vcxproj.filters

@@ -61,9 +61,6 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="README.md" />
-    <None Include="docs\solution-notes-letter.ru.md">
-      <Filter>docs</Filter>
-    </None>
     <None Include="docs\task-description.md">
       <Filter>docs</Filter>
     </None>
@@ -97,5 +94,11 @@
     <None Include="LICENSE">
       <Filter>docs</Filter>
     </None>
+    <None Include="docs\implementation-notes-letter.md">
+      <Filter>docs</Filter>
+    </None>
+    <None Include="docs\implementation-notes-letter.ru.md">
+      <Filter>docs</Filter>
+    </None>
   </ItemGroup>
 </Project>