At this point, I consider the batch scripts @IBNobody and I worked on to mostly be a failure. They've proven to be unreliable, too dependent on the environment they're being run in, and I've seen far too many examples of people having frustrating issues with them that I haven't been able to help them with. They can also produce misleading and confusing error messages. I've been pointing people to use the WSL for a while now. Eventually, I think we should make a proper replacement for the batch scripts, possibly with an environment in msys2. For now, the WSL method in Windows 10 is far more reliable, and is easy to set up.
I also cleaned up some things in the WSL instructions themselves.
new file: keyboards/lets_splitv2/Makefile
new file: keyboards/lets_splitv2/config.h
new file: keyboards/lets_splitv2/i2c.c
new file: keyboards/lets_splitv2/i2c.h
new file: keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png
new file: keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png
new file: keyboards/lets_splitv2/keymaps/default/keymap.c
new file: keyboards/lets_splitv2/lets_split.c
new file: keyboards/lets_splitv2/lets_split.h
new file: keyboards/lets_splitv2/matrix.c
new file: keyboards/lets_splitv2/pro_micro.h
new file: keyboards/lets_splitv2/readme.md
new file: keyboards/lets_splitv2/serial.c
new file: keyboards/lets_splitv2/serial.h
new file: keyboards/lets_splitv2/split_util.c
new file: keyboards/lets_splitv2/split_util.h
new file: keyboards/maxipad/Makefile
new file: keyboards/maxipad/config.h
new file: keyboards/maxipad/keymaps/default/Makefile
new file: keyboards/maxipad/keymaps/default/config.h
new file: keyboards/maxipad/keymaps/default/keymap.c
new file: keyboards/maxipad/keymaps/default/readme.md
new file: keyboards/maxipad/maxipad.c
new file: keyboards/maxipad/maxipad.h
new file: keyboards/maxipad/readme.md
climbalima