chore: vendor swabble and add speech usage strings

Swabble/scripts/lint.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+PEEKABOO_ROOT="${ROOT}/../peekaboo"
+if [ -f "${PEEKABOO_ROOT}/.swiftlint.yml" ]; then
+  CONFIG="${PEEKABOO_ROOT}/.swiftlint.yml"
+else
+  CONFIG="$ROOT/.swiftlint.yml"
+fi
+if ! command -v swiftlint >/dev/null; then
+  echo "swiftlint not installed" >&2
+  exit 1
+fi
+swiftlint --config "$CONFIG"