The files in data/ are specific to the client app (not the server).
This also avoids to reference the parent directory (../) from
app/meson.build.
Refs 8d583d36e2
On Windows, the file explorer does not provide any "open a terminal
here" shortcut.
Add a bat file which just runs `cmd` to easily open a terminal directly
in the scrcpy directory (so there is no need to `cd C:\path\…`).
PR #2970 <https://github.com/Genymobile/scrcpy/pull/2970>