fix: gracefully handle existing release branches

Author: Thanga-Ganapathy

CHANGELOG.md

@@ -14,6 +14,7 @@ adheres to [Semantic Versioning](https://semver.org/). Work in progress lives un
   configured tag convention instead of an implicit package-scoped format.
 
 ### Fixed
+- **version** — Modified `git checkout -b` to `git checkout -B` so that release branch creation gracefully handles previously abandoned branches by resetting them instead of crashing.
 - **version** — Removed the startup `gh` confirmation prompt and moved confirmation to a final
   review that shows the computed plan, changed files, and full git diff before commit/push/PR.
 - **init/npm** — npm workspace discovery now skips workspace manifests that are not release

crates/core/src/git.rs

@@ -114,7 +114,7 @@ impl GitOps for GitRepo {
     }
 
     fn create_branch(&self, name: &str) -> Result<()> {
-        run_git(&self.root, &["checkout", "-b", name]).map(|_| ())
+        run_git(&self.root, &["checkout", "-B", name]).map(|_| ())
     }
 
     fn checkout_branch(&self, name: &str) -> Result<()> {