Crystal: args not parsed before git repo check

[rsanheim]

Problem

When running git-all-crystal with flags from inside a git repository, the flags get passed directly to git instead of being parsed by git-all.

Steps to reproduce:

cd /some/git-repo
git-all-crystal -n 8 status

Expected: git-all parses -n 8 as workers flag, runs status on sibling repos

Actual:

unknown option: -n
usage: git [-v | --version] [-h | --help] [-C <path>] ...

Cause

In crystal/src/git-all.cr, the is_inside_git_repo? check happens before argument parsing:

def main
  if Meta.dispatch(ARGV)
    exit 0
  end

  if is_inside_git_repo?
    passthrough_to_git(ARGV)  # passes raw ARGV including -n flag
  end

  options = parse_args(ARGV)  # never reached when inside a repo
  ...
end

Fix

Either:

1. Parse args before the git repo check
2. Check if the first non-flag arg is a known git-all command before passing through
3. Match Rust/Zig behavior (need to verify how they handle this)