Add embedded MkDocs documentation site (#795)

Copy and convert existing MCP documentation into an embedded docs site
using MkDocs with Material theme. Includes client and server guides,
quickstart, development/contributing docs, architecture diagrams, and a
GitHub Actions workflow for publishing to GitHub Pages.

---------

Signed-off-by: Christian Tzolov <christian.tzolov@broadcom.com>

.github/workflows/docs.yml

@@ -0,0 +1,27 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docs/**'
+      - 'mkdocs.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+
+      - run: pip install mkdocs-material
+
+      - run: mkdocs gh-deploy --force