working multithreading

finally managed to multithread folder scanner and rtp. it may still have some bugs. but it works

src/client_frontend/x64/Debug/client_frontend.exe.recipe

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <ProjectOutputs>
+    <ProjectOutput>
+      <FullPath>C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\x64\Debug\client_frontend.exe</FullPath>
+    </ProjectOutput>
+  </ProjectOutputs>
+  <ContentFiles />
+  <SatelliteDlls />
+  <NonRecipeFileRefs />
+</Project>

src/client_frontend/x64/Debug/client_frontend.log

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+  client_frontend.cpp
+  client_frontend.vcxproj -> C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\x64\Debug\client_frontend.exe

src/client_frontend/x64/Debug/client_frontend.tlog/Cl.items.tlog

@@ -0,0 +1 @@
+C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\client_frontend.cpp;C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\x64\Debug\client_frontend.obj

src/client_frontend/x64/Debug/client_frontend.tlog/client_frontend.lastbuildstate

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+PlatformToolSet=v143:VCToolArchitecture=Native64Bit:VCToolsVersion=14.38.33130:TargetPlatformVersion=10.0.22621.0:VcpkgTriplet=x64-windows:
+Debug|x64|C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\|

src/client_frontend/x64/Debug/client_frontend.vcxproj.FileListAbsolute.txt

@@ -0,0 +1 @@
+C:\Users\janis\Documents\Projekte_mit_c\ma\ma\src\client_frontend\x64\Debug\client_frontend.exe

src/client_frontend/x64/Debug/vcpkg.applocal.log

@@ -0,0 +1 @@
+