Tweaks to mounted kitchen and workshop

[andrewhr]

Summary

Balance "Add cable ports and workbench to mounted kitchen and mounted workshop"

Purpose of change

Add WORKBENCH flag, to crafting can be done on those. They're flat surfaces after all. Workbench specs are similar to simple table, so a dedicated workbench (like we found on some specialized trucks) still make sense.

Add CABLE_PORTS flag, so we can connect and recharge tools. Yes, now you can recharge your smartphone while in bed on the default RV. The ports make senses as you can "attach" tools to similar effect. The systems were made concurrently and do not account for each other, the reason that may have escaped from earlier audit.

Describe the solution

As mentioned above, add both flags. Again, WORKBECH require extra configuration which I did stole from (vehicle) table.

Describe alternatives you've considered

• Workbench with same specs as dedicated workbenches
• Workbench with worse specs than simple tables
• Rework the attach/dettach system to be solely based on cables and ports. This one have been mentioned some times (at least one I can find on reddit) and it's sensible, but many too changes so better for another PR, also can spiral out and become scope creep.

Testing

Additional context