Decompile more of AdventureFlags.cpp (#118)

* fix flags getters and associated relocs

* explicit ARM and improve existing matches

* match CopyTo

* document a bit the flag system and progress on unmatched functions

* remaining bottom functions

* func_ov00_02097810 params and name fix

* fix build issues

* move flag base definition to its own file

* document item flags

---------

Co-authored-by: Yanis002 <Yanis002@users.noreply.github.com>
Co-authored-by: Aetias <aetias@outlook.com>

include/Cutscene/CutsceneHandler.hpp

@@ -43,6 +43,12 @@ public:
     /* 88 */ s32 mUnk_88;
     /* 8c */
 
+    void SetFlags(s32 value) {
+        mFlags1 &= value;
+        mFlags2 &= value;
+    }
+
+    void func_ov000_020980f8();
     s32 func_ov000_020980fc(unk32 param1, unk32 param2, void **param3);
     bool func_ov000_02098114();
     bool SkipCutscene(s32 param1);