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

docs/prds/0051-launch-selector.md

@@ -7,12 +7,12 @@
 
 ## Summary
 
-When `./cli.py start` is run without an agent name, or without a backend
+When `bot-bottle start` is run without an agent name, or without a backend
 explicitly specified, the user currently gets an argparse error (missing
 positional) or falls through to the `docker` default silently. This PRD
 adds a terminal UI that appears in those gaps: a filter-select screen
 built with `curses` that lets the operator pick the agent and/or backend
-interactively rather than memorising names or consulting `./cli.py list`.
+interactively rather than memorising names or consulting `bot-bottle list`.
 
 ## Problem
 
@@ -29,15 +29,15 @@ visible.
 
 ## Goals / Success Criteria
 
-1. `./cli.py start` (no arguments) shows an interactive agent selector;
+1. `bot-bottle start` (no arguments) shows an interactive agent selector;
    the selected name is used exactly as if it had been passed on the
    command line.
-2. `./cli.py start <name>` (no `--backend`, no `BOT_BOTTLE_BACKEND`)
+2. `bot-bottle start <name>` (no `--backend`, no `BOT_BOTTLE_BACKEND`)
    shows an interactive backend selector; the selected backend is used
    exactly as if `--backend=<selected>` had been passed.
-3. `./cli.py start <name> --backend=<b>` (both explicit) shows neither
+3. `bot-bottle start <name> --backend=<b>` (both explicit) shows neither
    screen — no behavioural change from today.
-4. `./cli.py start` (no arguments, no env backend) shows the agent
+4. `bot-bottle start` (no arguments, no env backend) shows the agent
    selector first, then the backend selector.
 5. The filter-select widget is a standalone utility
    (`bot_bottle/cli/tui.py`) shared by both selectors.
@@ -57,7 +57,7 @@ visible.
 - No pagination beyond what fits in the terminal window (scroll via
   cursor movement is sufficient for typical agent counts).
 - No multi-select; exactly one item is chosen per invocation.
-- No changes to `./cli.py resume`, `./cli.py list`, or any other
+- No changes to `bot-bottle resume`, `bot-bottle list`, or any other
   subcommand.
 
 ## Design
@@ -83,7 +83,7 @@ def filter_select(
 
 The widget renders to the tty file descriptor opened via `curses.initscr`
 (or `curses.newterm` on the tty fd so stdout remains clean for callers
-that pipe `./cli.py`).
+that pipe `bot-bottle`).
 
 Layout (full-width, minimal):
 
@@ -140,7 +140,7 @@ agent picker can populate itself from the real manifest. The same
 `filter_select` opens `/dev/tty` and feeds it as the input file to
 `curses.wrapper`-equivalent code (using `curses.newterm` to avoid
 clobbering the caller's stdout/stderr). This keeps the picker
-composable — callers can pipe `./cli.py` output without the curses
+composable — callers can pipe `bot-bottle` output without the curses
 draw sequences contaminating the pipe.
 
 ## Implementation chunks