rename .config to something else

[bjo81]

If e.g. a juicefs mountpoint is used as a homedirectory, this leads to some issues, as a lot of software stores its configuration in a .config-subdirectory. This it not possible when juicefs exposes a .config-file in its mountpoint.

[SandyXSD]

You can add the --prefix-internal option to the juicefs mount command, see: https://juicefs.com/docs/community/command_reference/#mount-fuse-options