[Feature request] Add KFL Miniature Flange Housing Units

[nfedyashev]

for example:

• KFL08 8mm
• KFL000 10mm
• KFL001 12mm

these are pretty common and easy to find so it might be a great addition to NopSCADlib

[nfedyashev]

Possible draft implementations:

https://github.com/pavlog/sscara/blob/b0572bbe0e854908a4dc96390b5a7777a127c40d/Modules/Bearings.scad#L245

https://github.com/FabulousFabrications/Print-o-Matic/blob/9fc8efbb0909738f4a7550598e29957174b7daa4/src/components/kfl08.scad#L17