Simplify netty worktree commands

Collapse the netty worktree helpers into wt create/remove/prune, keep wt-create as a thin wrapper, and drop the standalone wt-path command.

Also make the netty zsh wrappers handle cd-only behavior for wtc and wt remove.

Co-authored-by: Codex <noreply@openai.com>

scripts/wt-create.sh

@@ -2,28 +2,4 @@
 
 set -euo pipefail
 
-if [[ $# -ne 1 ]]; then
-  printf 'usage: wt-create <worktree-name>\n' >&2
-  exit 1
-fi
-
-branch_name=$1
-repo_root=$(git rev-parse --show-toplevel 2>/dev/null) || {
-  printf 'wt-create: not inside a git repository\n' >&2
-  exit 1
-}
-
-target_path=$(wt-path "$branch_name")
-
-if [[ -e "$target_path" ]]; then
-  printf 'wt-create: path already exists: %s\n' "$target_path" >&2
-  exit 1
-fi
-
-if git -C "$repo_root" show-ref --verify --quiet "refs/heads/$branch_name"; then
-  git -C "$repo_root" worktree add -- "$target_path" "$branch_name" 1>&2
-else
-  git -C "$repo_root" worktree add -b "$branch_name" -- "$target_path" HEAD 1>&2
-fi
-
-printf '%s\n' "$target_path"
+exec wt create "$@"