add docs for graph package (#603)

apps/docs/memory-graph/installation.mdx

@@ -0,0 +1,28 @@
+---
+title: 'Installation'
+description: 'Install and set up the Memory Graph component'
+---
+
+## Installation
+
+Install the package using your preferred package manager:
+
+```bash npm
+npm install @supermemory/memory-graph
+```
+
+## Requirements
+
+- **React**: 18.0.0 or higher
+- **react-dom**: 18.0.0 or higher
+
+## Next Steps
+
+<CardGroup cols={2}>
+  <Card title="Quick Start" icon="rocket" href="/memory-graph/quickstart">
+    Get the graph running with real data
+  </Card>
+  <Card title="API Reference" icon="code" href="/memory-graph/api-reference">
+    Explore all available props and types
+  </Card>
+</CardGroup>