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/templates/agent/fragments/conditional-loading.md

@@ -0,0 +1,17 @@
+## Conditional Documentation Loading
+
+**Load `~/.config/mosaic/guides/E2E-DELIVERY.md` first, then load the relevant guide before starting work:**
+
+| Task Type                                | Guide                                       |
+| ---------------------------------------- | ------------------------------------------- |
+| End-to-end implementation and validation | `~/.config/mosaic/guides/E2E-DELIVERY.md`   |
+| Bootstrapping a new project              | `~/.config/mosaic/guides/BOOTSTRAP.md`      |
+| Orchestrating autonomous tasks           | `~/.config/mosaic/guides/ORCHESTRATOR.md`   |
+| Frontend development                     | `~/.config/mosaic/guides/FRONTEND.md`       |
+| Backend/API development                  | `~/.config/mosaic/guides/BACKEND.md`        |
+| TypeScript strict typing                 | `~/.config/mosaic/guides/TYPESCRIPT.md`     |
+| Code review                              | `~/.config/mosaic/guides/CODE-REVIEW.md`    |
+| Authentication/Authorization             | `~/.config/mosaic/guides/AUTHENTICATION.md` |
+| Infrastructure/DevOps                    | `~/.config/mosaic/guides/INFRASTRUCTURE.md` |
+| QA/Testing                               | `~/.config/mosaic/guides/QA-TESTING.md`     |
+| Secrets management (Vault)               | `~/.config/mosaic/guides/VAULT-SECRETS.md`  |