NOISSUE debranding for real, initial work

This is probably very broken on macOS and Windows and will need a lot of work to complete fully.

.gitmodules

@@ -1,6 +1,8 @@
 [submodule "depends/libnbtplusplus"]
     path = libraries/libnbtplusplus
     url = https://github.com/MultiMC/libnbtplusplus.git
+    pushurl = git@github.com:MultiMC/libnbtplusplus.git
 [submodule "libraries/quazip"]
     path = libraries/quazip
     url = https://github.com/MultiMC/quazip.git
+    pushurl = git@github.com:MultiMC/quazip.git