docs: name bot-bottle, not ./cli.py, in every instruction

`doctor` told users to run `./cli.py backend setup`. cli.py is a four-line
wrapper at the repo root that calls bot_bottle.cli:main, and it does not ship —
[tool.setuptools.packages.find] includes only bot_bottle*, so anyone who
installed rather than cloned has no such file. Confirmed against a real
install: the user's tree contains exactly one executable, `bot-bottle`, and no
cli.py anywhere, while doctor recommended `./cli.py` three times. Invisible in
development, where ./cli.py works fine from a checkout, which is why only a
clean-install test surfaced it.

The two entry points are the same code, so the fix is to name the one that
always exists. 141 replacements across 45 files: the runtime messages that
caused this, plus README, docs, PRDs, research notes and test prose, so nothing
teaches the invocation a user cannot run.

scripts/demo.sh is deliberately untouched — it *executes* ./cli.py from a
checkout, where that is the correct and available path.

Verified end to end: a sandbox install now reports
"Run: bot-bottle backend setup --backend=firecracker", and bot-bottle is on
that user's PATH. Unit suite unchanged against the pre-existing baseline.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WEfZZhakx13bxTfXcZCoS5

bot_bottle/backend/macos_container/setup.py

@@ -5,7 +5,7 @@ Like Docker, this backend needs no privileged network-pool provisioning
 running. `setup()` points at the install/`container system start` steps;
 `status()` reports readiness. Reached via
 `MacosContainerBottleBackend.setup` / `.status`, dispatched from the
-generic `./cli.py backend {setup,status}`.
+generic `bot-bottle backend {setup,status}`.
 """
 
 from __future__ import annotations
@@ -75,5 +75,5 @@ def status() -> int:
         if not _service_running():
             ok = False
     if not ok:
-        sys.stderr.write("\nRun: ./cli.py backend setup --backend=macos-container\n")
+        sys.stderr.write("\nRun: bot-bottle backend setup --backend=macos-container\n")
     return 0 if ok else 1