mesh.hex.blocks: one conforming hex mesh of a design split into blocks

Meshes the open design's bodies (or the listed ones) as the cells of one
conforming all-hex mesh with one size and tessellation tolerance for all;
elements carry their cell's body, boundary faces its B-rep faces. A cell
that is no block, or cells that touch without sharing whole faces, is an
error naming the bodies. Catalogue entry with its VectorCraft icon, the
MCP mesh tool's hex_blocks method, docs/features.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

crates/mcp/src/tools.rs

@@ -18,6 +18,7 @@ const MESHERS: &[(&str, &str, &str)] = &[
     ("hex", "mesh.hex.generate", "all-hex mesh of a body"),
     ("hex_sweep", "mesh.hex.sweep", "swept all-hex mesh"),
     ("hex_mapped", "mesh.hex.mapped", "mapped all-hex mesh"),
+    ("hex_blocks", "mesh.hex.blocks", "one conforming all-hex mesh of a design split into six-sided blocks {bodies, size, order}"),
     ("block", "mesh.block", "structured hex block"),
     ("planar", "mesh.planar", "2D elements of a polygon or a planar face"),
 ];