refactor(cli): group subcommand handlers under cli/commands/

Move the eleven per-command modules (backend, cleanup, commit, edit,
info, init, list, login, resume, start, supervise) into a new
bot_bottle/cli/commands/ package, leaving the dispatcher (__init__),
entrypoint (__main__), and shared helpers (_common, tui) at the cli
root. Makes the command surface obvious at a glance and separates
handlers from the plumbing that registers them.

Updated the dispatcher's COMMANDS imports to .commands.*, bumped the
moved files' relative-import depths (.._common, .. import tui, sibling
.start unchanged), and repointed test references to
bot_bottle.cli.commands.*. Full unit suite green (2243); CLI dispatch
verified via `python -m bot_bottle.cli --help`.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/cli/commands/resume.py

@@ -0,0 +1,59 @@
+"""resume: re-launch a bottle by its identity.
+
+Reads ~/.bot-bottle/state/<identity>/metadata.json to recover the
+(agent_name, cwd, copy_cwd) the bottle was originally started with,
+then runs the same launch core as `start` — but pinned to the
+recorded identity so the new bottle picks up any per-bottle Dockerfile
+override and transcript snapshot under the same state dir.
+
+Use case: an interrupted or preserved bottle needs to be relaunched;
+the operator runs
+    ./cli.py resume <identity>
+to bring up the replacement from the recorded state.
+"""
+
+from __future__ import annotations
+
+import argparse
+
+from ...backend import BottleSpec
+from ...bottle_state import read_metadata
+from ...log import die
+from ...manifest import ManifestIndex
+from .._common import PROG, USER_CWD
+from .start import _launch_bottle
+
+
+def cmd_resume(argv: list[str]) -> int:
+    parser = argparse.ArgumentParser(prog=f"{PROG} resume", add_help=True)
+    parser.add_argument("--dry-run", action="store_true")
+    parser.add_argument(
+        "identity",
+        help="bottle identity from a prior `start` (see its session-end output)",
+    )
+    args = parser.parse_args(argv)
+
+    metadata = read_metadata(args.identity)
+    if metadata is None:
+        die(
+            f"no state recorded for identity {args.identity!r}; "
+            f"check ~/.bot-bottle/state/ or run `cli.py start` to create a new bottle"
+        )
+
+    manifest = ManifestIndex.resolve(USER_CWD)
+    manifest.require_agent(metadata.agent_name)
+
+    spec = BottleSpec(
+        manifest=manifest,
+        agent_name=metadata.agent_name,
+        copy_cwd=metadata.copy_cwd,
+        user_cwd=metadata.cwd or USER_CWD,
+        identity=metadata.identity,
+        bottle_names=tuple(metadata.bottle_names),
+    )
+    backend_name = metadata.backend or None
+    return _launch_bottle(
+        spec,
+        dry_run=args.dry_run,
+        backend_name=backend_name,
+    )