Update documentation configuration (#86)

* Docs configuration

* Update docs/index.md

Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>

* Update the configuration

* Update docs/docfx.json

Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>

* Update config

* Update icons, use Makefile, remove warnings

* Use a link that passes markdown link validation

* remove working directory

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Co-authored-by: Eirik Tsarpalis <eirik.tsarpalis@gmail.com>

docs/index.md

@@ -0,0 +1,23 @@
+---
+_layout: landing
+---
+
+# Overview
+
+The official C# SDK for the [Model Context Protocol](https://modelcontextprotocol.io/), enabling .NET applications, services, and libraries to implement and interact with MCP clients and servers. Please visit our [API documentation](https://modelcontextprotocol.github.io/csharp-sdk/api/ModelContextProtocol.html) for more details on available functionality.
+
+## About MCP
+
+The Model Context Protocol (MCP) is an open protocol that standardizes how applications provide context to Large Language Models (LLMs). It enables secure integration between LLMs and various data sources and tools.
+
+For more information about MCP:
+
+- [Official Documentation](https://modelcontextprotocol.io/)
+- [Protocol Specification](https://spec.modelcontextprotocol.io/)
+- [GitHub Organization](https://github.com/modelcontextprotocol)
+
+For how-to guides, tutorials, and additional guidance, refer to the [official MCP documentation](https://modelcontextprotocol.io/).
+
+## License
+
+This project is licensed under the [MIT License](https://github.com/modelcontextprotocol/csharp-sdk/blob/main/LICENSE).