Release v0.2.1

Improve error diagnostics for `wtclone rm` (gitignored entries blocking
removal) and `wtclone add` (existing-branch state distinguished into
four cases with tailored remediation).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Matthieu Ciappara

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.2.1] - 2026-04-28
+
 ### Changed
 
 - `wtclone rm` now detects gitignored entries (caches, build artifacts, vendored deps) before delegating to `git worktree remove`. These pass git's cleanliness check but block the final `rmdir` with the cryptic `failed to delete '...': Directory not empty`. The new pre-check fails with a message that names the offending entries and points to the two remediation paths: `wtclone rm <branch> --force`, or `git -C <wt_path> clean -fdX` to clean first. Behavior is unchanged — `--force` still bypasses the check.

bin/wtclone

@@ -11,7 +11,7 @@
 
 set -euo pipefail
 
-WTCLONE_VERSION="0.2.0"
+WTCLONE_VERSION="0.2.1"
 SAFE_FETCH_REFSPEC='+refs/heads/*:refs/remotes/origin/*'
 
 usage() {