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>

docs/stylesheets/extra.css

@@ -0,0 +1,13 @@
+:root {
+  --md-primary-fg-color: #16A34A;
+  --md-primary-fg-color--light: #07C983;
+  --md-primary-fg-color--dark: #15803D;
+  --md-accent-fg-color: #07C983;
+}
+
+[data-md-color-scheme="slate"] {
+  --md-primary-fg-color: #07C983;
+  --md-primary-fg-color--light: #07C983;
+  --md-primary-fg-color--dark: #15803D;
+  --md-accent-fg-color: #07C983;
+}