feat: integrate framework files into monorepo under packages/mosaic/framework/

Moves all Mosaic framework runtime files from the separate bootstrap repo
into the monorepo as canonical source. The @mosaic/mosaic npm package now
ships the complete framework — bin scripts, runtime configs, tools, and
templates — enabling standalone installation via npm install.

Structure:
  packages/mosaic/framework/
  ├── bin/          28 CLI scripts (mosaic, mosaic-doctor, mosaic-sync-skills, etc.)
  ├── runtime/      Runtime adapters (claude, codex, opencode, pi, mcp)
  ├── tools/        Shell tooling (git, prdy, orchestrator, quality, etc.)
  ├── templates/    Agent and repo templates
  ├── defaults/     Default identity files (AGENTS.md, STANDARDS.md, SOUL.md, etc.)
  ├── install.sh    Legacy bash installer
  └── remote-install.sh  One-liner remote installer

Key files with Pi support and recent fixes:
- bin/mosaic: launch_pi() with skills-local loop
- bin/mosaic-doctor: --fix auto-wiring for all 4 harnesses
- bin/mosaic-sync-skills: Pi as 4th link target, symlink-aware find
- bin/mosaic-link-runtime-assets: Pi settings.json patching
- bin/mosaic-migrate-local-skills: Pi skill roots, symlink find
- runtime/pi/RUNTIME.md + mosaic-extension.ts

Package ships 251 framework files in the npm tarball (278KB compressed).

packages/mosaic/framework/bin/mosaic-upgrade-slaves

@@ -0,0 +1,116 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
+BOOTSTRAP_CMD="$MOSAIC_HOME/bin/mosaic-bootstrap-repo"
+
+roots=("$HOME/src")
+apply=0
+
+usage() {
+  cat <<USAGE
+Usage: $(basename "$0") [options]
+
+Upgrade all Mosaic-linked slave repositories by re-running repo bootstrap with --force.
+
+Options:
+  --root <path>   Add a search root (repeatable). Default: $HOME/src
+  --apply         Execute upgrades. Without this flag, script is dry-run.
+  -h, --help      Show this help
+USAGE
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --root)
+      [[ $# -lt 2 ]] && { echo "Missing value for --root" >&2; exit 1; }
+      roots+=("$2")
+      shift 2
+      ;;
+    --apply)
+      apply=1
+      shift
+      ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      echo "Unknown argument: $1" >&2
+      usage >&2
+      exit 1
+      ;;
+  esac
+done
+
+if [[ ! -x "$BOOTSTRAP_CMD" ]]; then
+  echo "[mosaic-upgrade] Missing bootstrap command: $BOOTSTRAP_CMD" >&2
+  echo "[mosaic-upgrade] Install/refresh framework first: ~/.config/mosaic/install.sh" >&2
+  exit 1
+fi
+
+# De-duplicate roots while preserving order.
+uniq_roots=()
+for r in "${roots[@]}"; do
+  skip=0
+  for e in "${uniq_roots[@]}"; do
+    [[ "$r" == "$e" ]] && { skip=1; break; }
+  done
+  [[ $skip -eq 0 ]] && uniq_roots+=("$r")
+done
+
+candidates=()
+for root in "${uniq_roots[@]}"; do
+  [[ -d "$root" ]] || continue
+
+  while IFS= read -r marker; do
+    repo_dir="$(dirname "$(dirname "$marker")")"
+    if [[ -d "$repo_dir/.git" ]]; then
+      candidates+=("$repo_dir")
+    fi
+  done < <(find "$root" -type f -path '*/.mosaic/README.md' 2>/dev/null)
+done
+
+# De-duplicate repos while preserving order.
+repos=()
+for repo in "${candidates[@]}"; do
+  skip=0
+  for existing in "${repos[@]}"; do
+    [[ "$repo" == "$existing" ]] && { skip=1; break; }
+  done
+  [[ $skip -eq 0 ]] && repos+=("$repo")
+done
+
+count_total=${#repos[@]}
+count_ok=0
+count_fail=0
+
+mode="DRY-RUN"
+[[ $apply -eq 1 ]] && mode="APPLY"
+
+echo "[mosaic-upgrade] Mode: $mode"
+echo "[mosaic-upgrade] Roots: ${uniq_roots[*]}"
+echo "[mosaic-upgrade] Linked repos found: $count_total"
+
+if [[ $count_total -eq 0 ]]; then
+  exit 0
+fi
+
+for repo in "${repos[@]}"; do
+  if [[ $apply -eq 1 ]]; then
+    if "$BOOTSTRAP_CMD" "$repo" --force >/dev/null; then
+      echo "[mosaic-upgrade] upgraded: $repo"
+      count_ok=$((count_ok + 1))
+    else
+      echo "[mosaic-upgrade] FAILED: $repo" >&2
+      count_fail=$((count_fail + 1))
+    fi
+  else
+    echo "[mosaic-upgrade] would upgrade: $repo"
+  fi
+done
+
+if [[ $apply -eq 1 ]]; then
+  echo "[mosaic-upgrade] complete: ok=$count_ok failed=$count_fail total=$count_total"
+  [[ $count_fail -gt 0 ]] && exit 1
+fi