feat(worktree): add interactive delete command

Cargo.toml

@@ -10,3 +10,4 @@ serde_yaml = "0.9"
 sha2 = "0.10"
 toml = "0.8"
 globset = "0.4"
+dialoguer = "0.11"

README.md

@@ -92,7 +92,7 @@ wtk new feature/full-stack --ag full-stack
 The [User Guide](docs/user-guide.md) has the full workflow guide and command reference, including:
 
 - install, upgrade, and local source install
-- creating, checking out, listing, and removing worktrees
+- creating, checking out, listing, and deleting/removing worktrees
 - `send-out` and `bring-in`
 - Auxiliary Groups and coordinated worktrees
 - base branch selection

docs/user-guide.md

@@ -244,6 +244,14 @@ wtk list [--json]
 
 Lists visible worktrees in a compact table, or prints machine-readable JSON with `--json`.
 
+### `wtk delete`
+
+```text
+wtk delete
+```
+
+Opens an interactive terminal-only multi-select delete flow. Select linked worktrees with Space, press Enter, review the absolute-path summary, then type exactly `Y` to delete. Branches are preserved. Dirty selected worktrees are force-removed after confirmation. Selecting a coordinated Primary Repository worktree deletes its recorded coordinated set.
+
 ### `wtk remove`
 
 ```text