Update `switch_face` to `attachment_face` and add bells (#2512)
* Bell `attachment` mechanism beginnings
* It worked the whole time! I was using the wrong `adjust` command :P
Thanks for letting me know Aya.
* Add `attachment` logic to `switch_face`
Also updates `MaterialSwitchFace` to new Property system
* Update mech to `attachment_face` and more optimizations
* Update meta and add value for `DOUBLE_WALL`
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commit: 7341333)
