OpenSCAD V-rail extrusion library

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This versatile library for OpenSCAD generates V-Rail extrusions frequently used in various projects. This specific version remains compact and efficient by leveraging basic repeated geometry within the rail. Minimal math involved ensures fast rendering and display. Usage: Place this file in your OpenSCAD library folder or local project directory. Include the library in your project with: `use <v_rail_extrusion.scad>;` Call the function like so: `v_rail_extrusion(size, height, smoothing);` Parameters: * size The profile size (square) of the extrusion in millimeters Default value: 20 * height The length of an extrusion to produce in millimeters Default value: 100 * smoothing Smooth the outer corners of the extrusion? Default value: True