feat: renumber lib reference into 4-pillar anatomy

Renumber the 15 reference docs into pillar groups (recipe -> anatomy):
- 01 Build Recipe (entry), 02 Composition Root
- domains: 10 Layering Rules
- contract: 20 Spec-First Routing, 21 CRUD Template, 22 Auth Integration
- interfaces/infra: 30 Infra Adapters
- UI: 40 UI: Auto-Rendered Admin & Custom Pages (new; @aetoskia packages,
  client template, x- catalog via react-openapi MCP module)
- pipelines: 50 Pipeline Scaffold, 51 Worker & Progress, 52 Human-in-the-Loop
- delivery/meta: 90 Drone Pipelines, 91 Versioning & Changelog,
  92 Genericity Matrix, 93 Library Registry, 94 Repository Inventory

MCP module names are unchanged (NN_ prefix stripped); all cross-references
(wiki, templates, hooks, registry) updated; lib index rewritten pillar-first;
build recipe bootstraps the client template. Bundle + HTML sites regenerated.

standards/src/templates/README.md

@@ -68,7 +68,7 @@ When a family needs its own stages, copy `pipelines/example/`:
 
 The shared loader wires the root through the DI library (`hexa.build`) and merges
 the pattern fragments; the registry resolves a `(kind, variant, mode)` triple to
-a root class. See standards "06_pipeline_scaffold".
+a root class. See standards "50_pipeline_scaffold".
 
 ## What to keep, what to replace
 

standards/src/templates/app/pipelines/item_sync.py

@@ -5,7 +5,7 @@ Item-sync pipeline — the demo pipeline axis of the blueprint.
 Runs on the worker, consumes a pending job, and materializes its payload as an
 item. Steps are plain async functions here; once the chain branches or needs
 deterministic replay, wrap the steps in a dagpipe DAG (see standards
-"06_pipeline_scaffold").
+"50_pipeline_scaffold").
 """
 import logging
 

standards/src/templates/app/pipelines/shared/__init__.py

@@ -1,5 +1,5 @@
 """# Summary
 
 Shared pipeline scaffolding — ports, loader, and registry reused by every
-pipeline family. See standards "06_pipeline_scaffold".
+pipeline family. See standards "50_pipeline_scaffold".
 """

standards/src/templates/app/worker.py

@@ -7,7 +7,7 @@ the API axis, workers consume them on a fixed cadence.
 Notes:
 - This process is separate from the API process. Any in-memory event bus is per
   process — if the pipeline must surface live progress to the API, swap the bus
-  adaptor for a broker-backed one (see standards 07_worker_and_progress).
+  adaptor for a broker-backed one (see standards 51_worker_and_progress).
 """
 import asyncio
 import logging