Links Awakening: Implement New Game (#1334)

Adds Link's Awakening: DX. Fully imports and forks LADXR, with permission - https://github.com/daid/LADXR

worlds/ladx/LADXR/patches/heartPiece.py

@@ -0,0 +1,42 @@
+from ..assembler import ASM
+
+
+def fixHeartPiece(rom):
+    # Patch all locations where the piece of heart is rendered.
+    rom.patch(0x03, 0x1b52, ASM("ld de, $5A4D\ncall $3BC0"), ASM("ld a, $04\nrst 8"), fill_nop=True)  # state 0
+
+    # Write custom code in the first state handler, this overwrites all state handlers
+    # Till state 5.
+    rom.patch(0x03, 0x1A74, 0x1A98, ASM("""
+        ; Render sprite
+        ld   a, $05
+        rst  8
+    
+        ; Handle item effect
+        ld   a, $06 ; giveItemMultiworld
+        rst  8
+        
+        ;Show message
+        ld   a, $0A ; showMessageMultiworld
+        rst  8
+        
+        ; Switch to state 5
+        ld   hl, $C290; stateTable
+        add  hl, bc
+        ld   [hl], $05
+        ret
+    """), fill_nop=True)
+    # Insert a state 5 handler
+    rom.patch(0x03, 0x1A98, 0x1B17, ASM("""
+        ; Render sprite
+        ld   a, $05
+        rst  8
+
+        ld   a, [$C19F] ; dialog state
+        and  a
+        ret  nz
+
+        call $512A ; mark room as done
+        call $3F8D ; unload entity
+        ret
+    """), fill_nop=True)