fix: quote args in fish shell completion (#2285)

* fix: quote args in fish shell completion

The arguments used for dynamic completions in fish were missing quotes.
This resulted in an error when one of the arguments had a `*` in it
whose expansion matched no file. Once the completion got triggered, fish
errored with the message `No matches for wildcard [...]`. Don't quote
the first argument as that is the name of the binary.

* Protect against arguments that start with --

Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>

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Co-authored-by: Marc Khouzam <marc.khouzam@gmail.com>