fix(semver): resolve shirabe-semver compile errors

- Replace RefCell with Mutex in Constraint for thread safety
- Add clone_box() to ConstraintInterface for cloning trait objects
- Propagate Result from Constraint::new() and unwrap at call sites
- Fix VersionParser instantiation (unit struct, not fn)
- Add indexmap dependency to shirabe-semver

1 files changed, 6 insertions, 0 deletions

diff --git a/crates/shirabe-semver/src/constraint/match_none_constraint.rs b/crates/shirabe-semver/src/constraint/match_none_constraint.rs
index 4add794..17a45bb 100644
--- a/crates/shirabe-semver/src/constraint/match_none_constraint.rs
+++ b/crates/shirabe-semver/src/constraint/match_none_constraint.rs
@@ -34,6 +34,12 @@ impl ConstraintInterface for MatchNoneConstraint {
         "[]".to_string()
     }
 
+    fn clone_box(&self) -> Box<dyn ConstraintInterface> {
+        Box::new(MatchNoneConstraint {
+            pretty_string: self.pretty_string.clone(),
+        })
+    }
+
     fn as_any(&self) -> &dyn std::any::Any {
         self
     }