docs(standards): mirror doc-forge wiki style; mermaid + copyable build prompt

- move templates into src/templates; renumber wiki pages; add app-components page

- embed agentic build prompt as a copyable markdown block; add mermaid diagrams

- build.py writes <name>/mcp; config static bundle -> standards/mcp

- registry reads libraries.json as bytes (committed file was UTF-16LE); normalize to UTF-8

- Dockerfile: drop stale blog copy; per-repo <name>/mcp copies

- drop nested standards/mcp/standards duplicate and empty root mcp/

standards/src/templates/app/infra/db/repos/mongo.py

@@ -0,0 +1,42 @@
+"""# Summary
+
+Generic MongoDB CRUD repo — single implementation for all domains.
+
+Select a concrete mongo-ops repository (base, cached, or populating) from the
+options supplied to the factory.
+"""
+from typing import List, Optional, Type
+
+from mongo_ops import BaseRepository, CachedBaseRepository, PopulatingRepository
+from mongo_ops.cache import CacheBackend, CacheConfig
+from mongo_ops.models import BaseDocument
+from mongo_ops.populate import PopulationEngine, PopulateRule
+
+
+def _repo_factory(
+    collection: str,
+    db_model: Type[BaseDocument],
+    cache_backend: Optional[CacheBackend] = None,
+    cache_config: Optional[CacheConfig] = None,
+    engine: Optional[PopulationEngine] = None,
+    populate_rules: Optional[List[PopulateRule]] = None,
+) -> BaseRepository:
+    """Build the appropriate mongo-ops repository.
+
+    Args:
+        collection (str): Collection name to operate on.
+        db_model (Type[BaseDocument]): Document model bound to the collection.
+        cache_backend (Optional[CacheBackend]): Cache backend enabling cached reads.
+        cache_config (Optional[CacheConfig]): Cache configuration for the backend.
+        engine (Optional[PopulationEngine]): Population engine for reference expansion.
+        populate_rules (Optional[List[PopulateRule]]): Rules applied by the engine.
+
+    Returns:
+        BaseRepository: Repository instance matching the supplied options.
+    """
+    if engine and populate_rules is not None:
+        return PopulatingRepository(collection, db_model, engine, populate_rules)
+    elif cache_backend is not None:
+        return CachedBaseRepository(collection, db_model, cache_backend, cache_config)
+    else:
+        return BaseRepository(collection, db_model)