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/cleanup.py

@@ -0,0 +1,42 @@
+"""cleanup: stop and remove all active claude-bottle containers."""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+
+from .. import docker as docker_mod
+from ..log import info
+from ._common import read_tty_line
+
+
+def cmd_cleanup(_argv: list[str]) -> int:
+    docker_mod.require_docker()
+    result = subprocess.run(
+        ["docker", "ps", "--filter", "name=^claude-bottle-", "--format", "{{.Names}}"],
+        capture_output=True,
+        text=True,
+    )
+    containers = (result.stdout or "").strip()
+    if not containers:
+        info("no active claude-bottle containers")
+        return 0
+    print(file=sys.stderr)
+    for name in containers.splitlines():
+        info(f"found: {name}")
+    print(file=sys.stderr)
+    sys.stderr.write("claude-bottle: remove all of the above? [y/N] ")
+    sys.stderr.flush()
+    reply = read_tty_line()
+    if reply not in ("y", "Y", "yes", "YES"):
+        info("aborted")
+        return 0
+    for name in containers.splitlines():
+        info(f"removing {name}")
+        subprocess.run(
+            ["docker", "rm", "-f", name],
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL,
+        )
+    info("done")
+    return 0