kernel/process: Introduce process capability parsing skeleton

We've had the old kernel capability parser from Citra, however, this is
unused code and doesn't actually map to how the kernel on the Switch
does it. This introduces the basic functional skeleton for parsing
process capabilities.

src/core/CMakeLists.txt

@@ -113,6 +113,8 @@ add_library(core STATIC
     hle/kernel/object.h
     hle/kernel/process.cpp
     hle/kernel/process.h
+    hle/kernel/process_capability.cpp
+    hle/kernel/process_capability.h
     hle/kernel/readable_event.cpp
     hle/kernel/readable_event.h
     hle/kernel/resource_limit.cpp