knob socket cap M3 to M12

I went ahead and edited the scad to have more options, it now can make socket hex with or without the nut, as well as normal hex and added custom knob Height.
I used AI for the bolt sizes I added, so if there's any issue just let me know and I'll fix it.



// To make a hex knob only:
// hexNutHole = true ;
// socketHeadHole = false;
// To make a socket hex knob only:
// hexNutHole = false;
// socketHeadHole = true;
// To make one with both:
// hexNutHole = true;
// socketHeadHole = true;


# Short Changelog — Patched v1.5

## Changed

- Expanded bolt support from `M3, M4, M5` to `M3, M4, M5, M6, M8, M10, M12`.
- Added per-size settings for M6, M8, M10, and M12.
- Added `hexNutHole = true/false` option to enable or disable the rear hex nut pocket.
- Added per-size custom height values:
- `m3CustomHeight`
- `m4CustomHeight`
- `m5Cust