Add helix icon and start of toolbar/feature tree impl (#5062)

* Add icon

* Add to stdLibMap

* Add to toolbar as "kcl-only"

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Trigger CI

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Pierre Jacquier <pierre@zoo.dev>

src/lib/operations.ts

@@ -19,6 +19,10 @@ const stdLibMap: Record<string, StdLibCallInfo> = {
     label: 'Fillet',
     icon: 'fillet3d',
   },
+  helix: {
+    label: 'Helix',
+    icon: 'helix',
+  },
   hole: {
     label: 'Hole',
     icon: 'hole',