Add Power Platform Connector MCP Protocol Development Collection (#297)

* Add Power Platform MCP connector development collection

* Update README files with Power Platform MCP collection entries

* Add required frontmatter fields (mode, applyTo, model)

* Simplify collection to schema-compliant format per review feedback

* Update collections/power-platform-mcp-connector-development.collection.yml

Co-authored-by: Aaron Powell <me@aaron-powell.com>

---------

Co-authored-by: Aaron Powell <me@aaron-powell.com>

collections/power-platform-mcp-connector-development.collection.yml

@@ -0,0 +1,21 @@
+id: power-platform-mcp-connector-development
+name: Power Platform MCP Connector Development
+description: Complete toolkit for developing Power Platform custom connectors with Model Context Protocol integration for Microsoft Copilot Studio
+tags: 
+  - power-platform
+  - mcp
+  - copilot-studio
+  - custom-connector
+  - json-rpc
+items:
+  - path: instructions/power-platform-mcp-development.instructions.md
+    kind: instruction
+  - path: prompts/power-platform-mcp-connector-suite.prompt.md
+    kind: prompt
+  - path: prompts/mcp-copilot-studio-server-generator.prompt.md
+    kind: prompt
+  - path: chatmodes/power-platform-mcp-integration-expert.chatmode.md
+    kind: chat-mode
+display:
+  ordering: manual
+  show_badge: true