LADX: Implement various upstream adjustments (#3829)

* magnifying lens changes

https://github.com/daid/LADXR/pull/156

* restore enemy visibility in mermaid statue cave

https://github.com/daid/LADXR/pull/155

* mermaid statue scale bugfix

https://github.com/daid/LADXR/pull/163

* restore vanilla map when rooster is an item

https://github.com/daid/LADXR/pull/132

* fix

* fixes to magnifying lens changes

* load marin singing even if you have marin date
4feb3099a3

* Revert "load marin singing even if you have marin date"

This reverts commit a7a546ed3f7a2b9c9bcb095984cc64319a4f7855.

* always patch tradequest
not upstream, but included in this PR because it touches the same parts of the code. https://discord.com/channels/731205301247803413/1227373762412937347

* marin date fix

* fix logic

worlds/ladx/LADXR/patches/songs.py

@@ -72,6 +72,10 @@ def upgradeMarin(rom):
         rst  8
     """), fill_nop=True)
 
+    # Load marin singing even if you have the marin date
+    rom.patch(0x03, 0x0A91, ASM("jp nz, $3F8D"), "", fill_nop=True)
+    rom.patch(0x05, 0x0E6E, ASM("jp nz, $7B4B"), "", fill_nop=True)
+
 
 def upgradeManbo(rom):
     # Instead of checking if we have the song, check if we have a specific room flag set