Wrong message clicking on craftSign on craft piloted by different player

[goodroach]

Describe the bug The title says it all, think there is a bug with the logic because I remembered there being a specific message for that.

To Reproduce Steps to reproduce the behavior:

1. Have someone else pilot a craft for you
2. Try to click on their craft sign
3. "You are already commanding a craft!"

Expected behavior The message should say something else, maybe something like a generic "Craft is already commanded!" or a more specific "Someone else is commanding this craft!"

Versions (please complete the following information):

• Movecraft: [8.0.0 Beta 1]
• Addons: [Not sure if this matters]
• Java [JDK 16]
• Minecraft 1.16.5

Additional context This should probably be on the backburner but I'm writing this down so we are aware of this issue.

[TylerS1066]

Good idea, it should probably be a simple fix to CraftSign.java, the issue is that we always return that response regardless of who is the pilot around line 106.