v3.1.0 - Introduces Linear Rails

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
• Update mobo schematic with part numbers and ratings by @theacodes in #664

Full Changelog: v3.0.5...v3.1.0