feat(qmd): install, benchmark, migrate, and remove QMD local search

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/lib/qmd.sh

@@ -0,0 +1,21 @@
+# scripts/lib/qmd.sh
+#!/usr/bin/env bash
+
+sync_qmd() {
+  local root=$1 client=$2 home_path=$3 enabled=$4 dry_run=$5 update=$6 summary=${7:-false}
+  local arguments=("$root/scripts/lib/qmd.py" sync --root "$root" --home "$home_path" --client "$client" --enabled "$enabled")
+  [ "$dry_run" != true ] || arguments+=(--dry-run)
+  [ "$update" != true ] || arguments+=(--update)
+  [ "$summary" != true ] || arguments+=(--summary)
+  python3 "${arguments[@]}"
+}
+
+test_qmd_device() {
+  local root=$1 home_path=$2 summary=${3:-false}
+  local arguments=("$root/scripts/lib/qmd.py" benchmark --root "$root" --home "$home_path")
+  [ "$summary" != true ] || arguments+=(--summary)
+  local status
+  if python3 "${arguments[@]}" >&2; then return 0; else status=$?; fi
+  [ "$status" -eq 2 ] && return 1
+  return 2
+}