fs.mitm: WIP LayeredFS impl (NOTE: UNUSABLE ATM)

Also greatly refactors libstratosphere, and does a lot of other things.
There is a lot of code in this one.

stratosphere/pm/source/pm_info.hpp

@@ -1,12 +1,13 @@
 #pragma once
 #include <switch.h>
+#include <stratosphere.hpp>
 #include <stratosphere/iserviceobject.hpp>
 
 enum InformationCmd {
     Information_Cmd_GetTitleId = 0,
 };
 
-class InformationService final : IServiceObject {
+class InformationService final : public IServiceObject {
     public:
         Result dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size) override;
         Result handle_deferred() override;