chore/inspektor-gadget: Add cache volume (github#306)

Signed-off-by: Qasim Sarfraz <[email protected]>

Author: mqasimsarfraz

servers/inspektor-gadget/server.yaml

@@ -21,6 +21,7 @@ run:
     - -gadget-images={{inspektor-gadget.gadget-images}}
   volumes:
     - '{{inspektor-gadget.kubeconfig}}:/kubeconfig'
+    - ig-mcp-cache:/root/.cache/ig-mcp-server
 config:
   description: Configuration for the Inspektor Gadget MCP Server
   parameters: