feat: add install script packaging

install.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+set -eu
+
+PACKAGE_SPEC="${BOT_BOTTLE_INSTALL_SPEC:-git+https://gitea.dideric.is/didericis/bot-bottle.git}"
+MIN_PYTHON="3.11"
+
+say() {
+    printf 'bot-bottle install: %s\n' "$*" >&2
+}
+
+die() {
+    say "error: $*"
+    exit 1
+}
+
+command -v python3 >/dev/null 2>&1 || die "python3 is required (version ${MIN_PYTHON} or newer)"
+
+python3 - <<'PY' || die "python3 3.11 or newer is required"
+import sys
+
+raise SystemExit(0 if sys.version_info >= (3, 11) else 1)
+PY
+
+command -v docker >/dev/null 2>&1 || die "Docker is required; install Docker and start the daemon, then re-run this script"
+docker info >/dev/null 2>&1 || die "Docker is installed but the daemon is not reachable; start Docker and re-run this script"
+
+mkdir -p \
+    "${HOME}/.bot-bottle/agents" \
+    "${HOME}/.bot-bottle/bottles" \
+    "${HOME}/.bot-bottle/contrib"
+
+if command -v pipx >/dev/null 2>&1; then
+    say "installing with pipx"
+    pipx install --force "${PACKAGE_SPEC}"
+else
+    say "pipx not found; installing with python3 -m pip --user"
+    python3 -m pip install --user --upgrade "${PACKAGE_SPEC}"
+fi
+
+if command -v bot-bottle >/dev/null 2>&1; then
+    BOT_BOTTLE_BIN="bot-bottle"
+elif [ -x "${HOME}/.local/bin/bot-bottle" ]; then
+    BOT_BOTTLE_BIN="${HOME}/.local/bin/bot-bottle"
+    say "using ${BOT_BOTTLE_BIN}; add ${HOME}/.local/bin to PATH for future shells"
+else
+    die "bot-bottle was installed but is not on PATH"
+fi
+
+say "running bot-bottle doctor"
+"${BOT_BOTTLE_BIN}" doctor