Expand save system with data access framework

- Add Hashes struct for known save file offsets
- Add Float union for type conversion
- Implement placeholder functions for:
  * Reading u32/float from addresses
  * Writing float to addresses
  * Save file writing
- Add player position hash constant

source/save_basic.h

@@ -9,7 +9,20 @@ typedef struct
     char * saveFile;
 } gameDataSav;
 
+typedef struct {
+    u32 PLAYER_POSITION;
+} Hashes;
+
+typedef union Float {
+    float    m_float;
+    u8 m_bytes[sizeof(float)];
+} Float;
+
+u32 readU32FromAddr(u32 addr);
+float readF32FromAddr(u32 addr);
+void writeF32ToAddr(u32 addr, float value);
 void processSave();
 void openSave();
+void writeSave();
 
 #endif