Merges cad-staging to main for LumenPnP v3.1.0 release

[lucian151]

Adds linear rails to LumenPnP x-gantry and y-gantries

Merges @theacodes's linear rail mod with the following improvements:

• Consolidates toolhead 3D prints by merging the x-gantry-block design into x-gantry-back
  • x-gantry-front now attaches directly to x-gantry-back with 4x M5x40mm-socket-head bolts to greatly improve rigidity
• Adds insertion clearance for installing m5-hex-nut into y-gantry

Extends height of machine by 50mm

This change was made to improve tape clearance when exiting auto feeders. Affects the following parts

• aux-staging-plate-foot
• static camera foot
• front-leg-extension (new)
• back-leg-extension (new)
• front-left-leg / front-right-leg
• back-leg

Improves machine toolhead

• Rotates toolhead motors 90º to improve cable routing
• Adds zip-tie channel in z-gantry for toolhead cable strain-relief
• Updates pneumatic coupler to rotary-pneumatic-adapter to support continuous toolhead rotation

Improves top-camera assembly

• Adds a tunnel around the focus-adjustment-screw for ease of use
• Adds air flow vents to top-camera-mount to improve cooling
• Adds top-camera-cover to better protect top-camera
• Adds new region to top-light-cover to cover top-ring-light THT pins

Additional changes

• Updates nozzle-rack to support tool-free removal from staging-plate with use of 2x m3-wing-nut
• Adds mid-air hole print optimizations wherever needed
• Adjusted various component tolerances for ease of assembly
• Smoothed out many parts in this assembly where possible to better unify design language

[stuartpittaway]

This looks great @lucian151. Feel like the comments in DESIGN_DECISIONS.md need to be updated at the same time as this release - there are lots of points about not using linear rails - but now we are!

[theacodes]

Looks good to me, agreed with @stuartpittaway that we should also update DESIGN_DECISIONS.md. I'll add a commit here for that.

[lucian151]

Thanks for the changes to the design decision doc @theacodes! We still need to tweak the language of the "Why not CoreXY?" section as it still relates back to v-wheel. Maybe @sphawes would be best to author those changes.

Before this is all released, we need to revert the FTP strip feeder design back to the fileset used in v3.0.5. The strip-feeder refactor won't be ready in time for launch.

[sphawes]

Just updated the CoreXY section to remove the mention of rollers!

[lucian151]

Alright, thanks y'all! Your feedback has been addressed. Time to merge! 🦾