fix: regenerate docs/features.md (tet meshing is ready since #29) (#32)

Main's CI failed features_page_is_current: #29 marked mesh.tet.generate ready, and the page
generated on its branch was out of date once combined with main.


Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

Co-authored-by: jyviko <2501648+jyviko@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

docs/features.md

@@ -5,7 +5,7 @@ Generated from the capability catalogue (`crates/engine/src/catalogue.rs`) by
 Every entry is a toolbar button. **Ready** entries run their command; **coming soon** entries are
 shown greyed with the roadmap milestone that brings them (ROADMAP.md).
 
-36 ready, 64 coming soon.
+37 ready, 63 coming soon.
 
 ## Geometry