Doc updates (#14)

* Add stereotypes overview

* Add data portal guide

* Improve instructions and x-references

* Add additional resources

* Add aspnetcore configuration

* Fix markdown

* Add business rule unit testing doc

* docs: Add WpfConfiguration.md and update gemini.md

* docs: Add brownfield WPF configuration

* docs: Add Windows Forms configuration

* Add MAUI configuration doc

* Data portal routing and http channel docs

* Add gRPC data portal channel doc

* Add rabbitmq data portal channel doc

* Data portal channel docs

* Document SafeDataReader

* SmartDate document

* Document serialization configuration

Author: rockfordlhotka

.claude/settings.local.json

@@ -0,0 +1,7 @@
+{
+  "permissions": {
+    "allow": [
+      "WebFetch(domain:blog.lhotka.net)"
+    ]
+  }
+}