docs: add comprehensive documentation for MCP project

- Create comprehensive documentation structure using MkDocs
- Add markdown files for API reference, architecture, getting started, and troubleshooting
- Configure GitHub Pages deployment workflow
- Include custom Jekyll and MkDocs configurations
- Add custom styling and layout for documentation site

docs/assets/css/style.scss

@@ -0,0 +1,54 @@
+@import "{{ site.theme }}";
+
+// Custom styles
+.main-nav {
+    margin-top: 20px;
+
+    ul {
+        list-style: none;
+        padding: 0;
+        margin: 0;
+    }
+
+    li {
+        margin-bottom: 8px;
+    }
+
+    a {
+        color: #267CB9;
+        text-decoration: none;
+
+        &:hover {
+            text-decoration: underline;
+        }
+    }
+}
+
+h1,
+h2,
+h3 {
+    color: #333;
+}
+
+code {
+    background-color: #f8f8f8;
+    border: 1px solid #ddd;
+    border-radius: 3px;
+    padding: 2px 5px;
+}
+
+pre {
+    background-color: #f8f8f8;
+    border: 1px solid #ddd;
+    border-radius: 3px;
+    padding: 10px;
+    overflow-x: auto;
+}
+
+.wrapper {
+    max-width: 960px;
+}
+
+section {
+    max-width: 700px;
+}