Add documentation backed by mkdocs (#883)

Affects /docs - (Refined Documentation for deployment and added Some
Supporting documentation)
Added a github action for deployment

Fixes #835  

Added Support for mkdocs
Example -  https://dinesht04.github.io/go-sdk/

Requires Configuration of Github pages as follows:-

1. Enable Github Pages
2. Select gh-pages branch for deployment

<img width="1237" height="817" alt="gh-pages"
src="https://github.com/user-attachments/assets/01f0b012-d5f3-4011-9af9-7269e657ae6a"
/>

## Sources
# For mkdocs.yaml
1.
https://github.com/modelcontextprotocol/python-sdk/blob/main/mkdocs.yml
2. https://github.com/modelcontextprotocol/java-sdk/blob/main/mkdocs.yml
  3. MKDocs official documentation
# For Github Action
1.
https://github.com/modelcontextprotocol/python-sdk/blob/main/.github/workflows/publish-docs-manually.yml
2.
https://github.com/modelcontextprotocol/java-sdk/blob/main/.github/workflows/docs.yml
3.
https://github.com/james-willett/material-mkdocs-youtube-2024/blob/main/.github/workflows/ci.yml
- From Youtube Tutorial

docs/CNAME

@@ -0,0 +1 @@
+go.sdk.modelcontextprotocol.io