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/tools/qa/debug-hook.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# Debug hook to identify available variables
+
+echo "=== Hook Debug ===" >> /tmp/hook-debug.log
+echo "Date: $(date)" >> /tmp/hook-debug.log
+echo "All args: $@" >> /tmp/hook-debug.log
+echo "Arg count: $#" >> /tmp/hook-debug.log
+echo "Arg 1: ${1:-EMPTY}" >> /tmp/hook-debug.log
+echo "Arg 2: ${2:-EMPTY}" >> /tmp/hook-debug.log
+echo "Arg 3: ${3:-EMPTY}" >> /tmp/hook-debug.log
+echo "Environment:" >> /tmp/hook-debug.log
+env | grep -i file >> /tmp/hook-debug.log 2>/dev/null || true
+env | grep -i path >> /tmp/hook-debug.log 2>/dev/null || true
+env | grep -i tool >> /tmp/hook-debug.log 2>/dev/null || true
+echo "==================" >> /tmp/hook-debug.log