refactor(modules): rename home module to draw, restore first-tab order

The Home tab was already titled "Draw"; rename the module to match:
folder modules/home → modules/draw, HomeModule → DrawModule, id "home"
→ "draw". The inner draw/ command folder is kept (modules::draw::draw).

Update build.rs PRIORITY ("home" → "draw") so the tab returns to the
front of the ribbon; registry.rs regenerates accordingly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/modules/draw/modify/mod.rs

@@ -0,0 +1,22 @@
+pub mod align;
+pub mod array;
+pub mod attedit;
+pub mod break_cmd;
+pub mod copy;
+pub mod delete;
+pub mod explode;
+mod extend;
+pub mod fillet;
+pub mod join;
+pub mod lengthen;
+pub mod mirror;
+pub mod offset;
+pub mod pedit;
+pub mod refedit;
+pub mod rotate;
+pub mod scale;
+pub mod spline_ops;
+pub mod splinedit;
+pub mod stretch;
+pub mod translate;
+pub mod trim;