Rename SolveCraft to SolidCraft everywhere, with compatibility shims (#389)

* WIP deep rename (not for push)

* WIP2

* WIP3

* WIP4 wxs fix

* rustfmt

* Rename the remaining identifiers in merged crash-report code

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/tests/mirror_planes.rs

@@ -9,7 +9,7 @@ use crate::*;
 
 fn min_x(s: &Session, body: &str) -> f64 {
     let b = s.model.state().body(body).map(|b| b.body.clone()).unwrap();
-    solvecraft_kernel::measure(&b).unwrap().bbox.min.x
+    solidcraft_kernel::measure(&b).unwrap().bbox.min.x
 }
 
 #[test]