Release cadloop 0.3.0 · richardofortune/cadloop

The package no longer carries one project's model checks. render can keep a picture instead of only handing it back.

Changed — affects callers written against 0.2.0

cadloop-verify has been removed. It ran the spirograph example's own checks, and the gear half ran off constants compiled into the package — so on an install with no model on disk it printed 14/14 parts mesh cleanly about parts the caller did not have. Those checks now live in the repository beside the model they describe:
```
git clone https://github.com/richardofortune/cadloop && cd cadloop
pip install -e ".[verify]"
python models/verify_spirograph.py
```
The command still exists in this release as a stub that explains the move and exits 2, so a Makefile or CI step calling it stops rather than appearing to pass. The stub goes away in 0.4.0.
cadloop no longer pulls in shapely. pip install cadloop now installs mcp and nothing else. The verify extra remains, for the worked example.

render writes images. A .png output is kept in the workspace rather than returned, taking the same camera, imgsize, projection, colorscheme and full_render options preview has. Use preview to look at a model, render when the image is the artefact. Since render already accepted source as text, the older half of a before-and-after is git show <rev>:model.scad piped in — no checkout, no temp file.

docs/known-issues.md described the Creality Print CLI crash as specific to macOS and 7.1.1. It is neither — it reproduces on 7.2.0 under Windows 11, and does not depend on 3MF input the way the upstream issue title suggests.

Full changelog: https://github.com/richardofortune/cadloop/blob/main/CHANGELOG.md