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.c

@@ -4,6 +4,7 @@
 #include "save_basic.h"
 
 static gameDataSav save_data = {0};
+static Hashes HASHES = {.PLAYER_POSITION = 0xa40ba103};
 
 void openSave() {
     Result rc = 0;
@@ -37,7 +38,26 @@ void openSave() {
     printf("Save data mounted successfully!\n");
 }
 
+u32 readU32FromAddr(u32 addr) {
+    // TODO: Implement reading u32 from save file address
+    return 0;
+}
+
+float readF32FromAddr(u32 addr) {
+    // TODO: Implement reading float from save file address  
+    return 0.0f;
+}
+
+void writeF32ToAddr(u32 addr, float value) {
+    // TODO: Implement writing float to save file address
+}
+
 void processSave() {
     printf("Processing save data...\n");
-    // TODO: Implement actual save processing
+    // TODO: Load save file into memory for processing
+}
+
+void writeSave() {
+    printf("Writing save data...\n");
+    // TODO: Write modified data back to save file
 }