linux/arm64 wheels

Hi! I'm trying to build on Linux ARM64 and notice that there are no prebuilt wheels for this platform:

```
$ uv pip install cadquery cadquery-ocp
  ...
  hint: Wheels are available for `cadquery-ocp` (v7.7.2.2b2) on the
  following platforms: `manylinux_2_31_x86_64`, `macosx_11_0_arm64`,
  `macosx_11_0_x86_64`, `win_amd64`
```

Can we build them?