Parallel line tool (1-150 mm)

Remix of thing:4186423
I printed the design by KettithreeD, but printing those holes on support layers wasn't a success.
I wasn't able to remove the support and the numbers weren't readable.
so I designed my own version from scratch.

Upgrades:
- Added taper to the holes to allow for more precise drawing
- Moved the plate to the bottom to allow printing without support
- Switched from arabic to roman numerals for better printability at low scale (and for style)