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/orchestrator-matrix/adapters/README.md

@@ -0,0 +1,52 @@
+# Adapter Contract
+
+Runtime adapters translate task commands into concrete worker invocations.
+
+## Minimal Contract
+
+Each task should define either:
+
+1. `command` directly in `tasks.json`, or
+2. controller-level `worker.command_template` in `.mosaic/orchestrator/config.json`
+
+`command_template` may use:
+
+- `{task_id}`
+- `{task_title}`
+- `{task_file}`
+
+## Examples
+
+Codex:
+
+```json
+{
+  "worker": {
+    "command_template": "codex \"run task {task_id}: {task_title}\""
+  }
+}
+```
+
+Claude:
+
+```json
+{
+  "worker": {
+    "command_template": "claude -p \"Execute task {task_id}: {task_title}\""
+  }
+}
+```
+
+OpenCode:
+
+```json
+{
+  "worker": {
+    "command_template": "opencode \"execute task {task_id}: {task_title}\""
+  }
+}
+```
+
+## Recommendation
+
+Prefer explicit per-task `command` for deterministic execution and auditability.