Kernel: Add VMManager to manage process address spaces

This enables more dynamic management of the process address space,
compared to just directly configuring the page table for major areas.

This will serve as the foundation upon which the rest of the Kernel
memory management functions will be built.

src/core/CMakeLists.txt

@@ -36,6 +36,7 @@ set(SRCS
             hle/kernel/shared_memory.cpp
             hle/kernel/thread.cpp
             hle/kernel/timer.cpp
+            hle/kernel/vm_manager.cpp
             hle/service/ac_u.cpp
             hle/service/act_u.cpp
             hle/service/am_app.cpp
@@ -147,6 +148,7 @@ set(HEADERS
             hle/kernel/shared_memory.h
             hle/kernel/thread.h
             hle/kernel/timer.h
+            hle/kernel/vm_manager.h
             hle/result.h
             hle/service/ac_u.h
             hle/service/act_u.h