refactor(cli): split claude_bottle/cli.py into a package

One file per subcommand under claude_bottle/cli/, with shared constants
and the tty helper in _common.py and dispatch in __init__.py. The
public import (from claude_bottle.cli import main) is unchanged, so
the root cli.py entrypoint and the test suite see no surface change.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

claude_bottle/cli/edit.py

@@ -0,0 +1,43 @@
+"""edit: open an agent in vim for editing."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+from pathlib import Path
+
+from ..log import die
+from ._common import PROG, USER_CWD
+
+
+def cmd_edit(argv: list[str]) -> int:
+    parser = argparse.ArgumentParser(prog=f"{PROG} edit", add_help=True)
+    parser.add_argument("scope", choices=["user", "project"])
+    parser.add_argument("name")
+    args = parser.parse_args(argv)
+
+    if args.scope == "user":
+        target_file = Path(os.environ["HOME"]) / "claude-bottle.json"
+    else:
+        target_file = Path(USER_CWD) / "claude-bottle.json"
+
+    if not target_file.is_file():
+        die(f"{target_file} does not exist")
+
+    try:
+        doc = json.loads(target_file.read_text())
+    except json.JSONDecodeError:
+        die(f"{target_file} is not valid JSON")
+
+    if args.name not in (doc.get("agents") or {}):
+        die(f"agent '{args.name}' not found in {target_file}")
+
+    line = 1
+    text = target_file.read_text().splitlines()
+    needle = f'"{args.name}"'
+    for idx, l in enumerate(text, start=1):
+        if needle in l:
+            line = idx
+            break
+    os.execvp("vim", ["vim", f"+{line}", str(target_file)])