fix: correct a functional parameter causing a syntax error

[sahasbtw]

Having "--show-tags" in the same argparse argument definition as "--orphans" in cli.py made it believe it was encountering a positional argument after a keyword argument.
So I separated them.
My first PR sorry if I did something wrong...

Error I Received

Traceback (most recent call last):
  File "/SOMETHING/.local/bin/zk-graph-view", line 3, in <module>
    from zk_graph_view.cli import main
  File "/SOMETHING/zk-graph-view/src/zk_graph_view/cli.py", line 57
    )
    ^
SyntaxError: positional argument follows keyword argument