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/protocol/event.schema.json

@@ -0,0 +1,48 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://mosaicstack.dev/schemas/orchestrator/event.schema.json",
+  "title": "Mosaic Orchestrator Event",
+  "type": "object",
+  "required": ["event_id", "event_type", "task_id", "status", "timestamp", "source"],
+  "properties": {
+    "event_id": {
+      "type": "string",
+      "description": "UUID string"
+    },
+    "event_type": {
+      "type": "string",
+      "enum": [
+        "task.assigned",
+        "task.started",
+        "task.progress",
+        "task.completed",
+        "task.failed",
+        "rail.check.started",
+        "rail.check.passed",
+        "rail.check.failed"
+      ]
+    },
+    "task_id": {
+      "type": "string"
+    },
+    "status": {
+      "type": "string",
+      "enum": ["pending", "running", "completed", "failed"]
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "source": {
+      "type": "string",
+      "enum": ["controller", "worker", "quality-gate"]
+    },
+    "message": {
+      "type": "string"
+    },
+    "metadata": {
+      "type": "object"
+    }
+  },
+  "additionalProperties": true
+}

packages/mosaic/framework/tools/orchestrator-matrix/protocol/task.schema.json

@@ -0,0 +1,40 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://mosaicstack.dev/schemas/orchestrator/task.schema.json",
+  "title": "Mosaic Orchestrator Task",
+  "type": "object",
+  "required": ["id", "title", "status"],
+  "properties": {
+    "id": {
+      "type": "string"
+    },
+    "title": {
+      "type": "string"
+    },
+    "description": {
+      "type": "string"
+    },
+    "status": {
+      "type": "string",
+      "enum": ["pending", "running", "completed", "failed"]
+    },
+    "runtime": {
+      "type": "string",
+      "description": "Preferred worker runtime, e.g. codex, claude, opencode"
+    },
+    "command": {
+      "type": "string",
+      "description": "Worker command to execute for this task"
+    },
+    "quality_gates": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
+    "metadata": {
+      "type": "object"
+    }
+  },
+  "additionalProperties": true
+}