[BUG] "Multiple paths" checker should make sure paths aren't equal before warning user
e.g.
$ astra setup
Warning: Multiple astra home folders were detected at the following locations:
Warning: - /home/runner/.astra (default location)
Warning:
Warning: - /home/runner/.astra (custom path set via environment variable)
Warning:
Warning: Please either:
Warning: - remove or migrate the lower priority files/folders (custom > xdg > default/home)
Warning: - set 'ASTRA_IGNORE_MULTIPLE_PATHS=true' or use the '--ignore-multiple-paths' flag with 'astra shellenv' to suppress this warning