Final port to fastbuild.

Support update of game.dll separately
Made some alias and stuff
still remains the shader compiler to add to the solution.
Solution is also generated by fbuild (nice)

External/SDK/Clang/Windows/Clang.bff

@@ -102,8 +102,8 @@ Compiler( 'Compiler-Clang19-NonCL' )
 
     // Librarian
     .Librarian                      = '$Clang19_BasePath$\bin\llvm-ar.exe'
-    .LibrarianOptions               = '/c echo %1 > %2' // 'rc "%2" "%1"' // NOTE: output must come first
-
+    .LibrarianOptions               = 'rc "%2" "%1"' // NOTE: output must come first
+                                    // = '/c echo %1 > %2' // Debug options
     // Linker
     .Linker                         = '$Clang19_BasePath$\bin\lld-link.exe'
     .LinkerOptions                  = '/NODEFAULTLIB /WX /NOLOGO /INCREMENTAL:NO /OUT:"%2" "%1" /DEBUG'