first pass at overrides rewrite

overrides now live in default.cfg inside TAG.pak

skeleton/SYSTEM/rg35xx/paks/Emus/SFC.pak/default.cfg

@@ -0,0 +1,12 @@
+bind Up = UP
+bind Down = DOWN
+bind Left = LEFT
+bind Right = RIGHT
+bind Select = SELECT
+bind Start = START
+bind Y Button = Y
+bind X Button = X
+bind B Button = B
+bind A Button = A
+bind L Button = L1
+bind R Button = R1