Optimize builds in CMakeLists.txt and run.bat

CMakeLists.txt

@@ -90,7 +90,7 @@ if(WIN32)
 endif()
 
 if(MSVC)
-    target_compile_options(gitree PRIVATE /W4 /permissive-)
+    target_compile_options(gitree PRIVATE /W4 /permissive- /MP)
 else()
     target_compile_options(gitree PRIVATE -Wall -Wextra -Wpedantic)
 endif()

run.bat

@@ -17,7 +17,7 @@ if %errorlevel%==0 (
 if not exist build\CMakeCache.txt (
     cmake -S . -B build %GENERATOR% -DCMAKE_BUILD_TYPE=Release || exit /b 1
 )
-cmake --build build --config Release --parallel || exit /b 1
+cmake --build build --config Release --parallel %NUMBER_OF_PROCESSORS% || exit /b 1
 
 if exist build\bin\gitree.exe (
     start "" build\bin\gitree.exe %*