docs: document scripts/ folder and local cluster helper in README

Author: viragtripathi

README.md

@@ -23,6 +23,20 @@ For the **MCP Toolbox** backend (available now), install [MCP Toolbox for Databa
 brew install mcp-toolbox
 ```
 
+### Local Cluster (optional)
+
+Need a local CockroachDB to point the agent at? The repo ships a helper script that provisions a local multi-node insecure cluster on `localhost`:
+
+```bash
+./scripts/setup-cockroachdb.sh start     # start the cluster
+./scripts/setup-cockroachdb.sh status    # show running nodes
+./scripts/setup-cockroachdb.sh stop      # stop nodes (data preserved)
+./scripts/setup-cockroachdb.sh destroy   # stop and remove all data
+./scripts/setup-cockroachdb.sh --help    # all options (--nodes, --version, --port, ...)
+```
+
+The matching `setting-up-local-cluster` skill walks the agent through using it.
+
 ## Configuration
 
 Set environment variables for your CockroachDB connection:
@@ -215,9 +229,11 @@ cd cursor-plugin
 ### Project Structure
 
 ```
-.cursor-plugin/plugin.json   # Plugin manifest
+.cursor-plugin/plugin.json    # Plugin manifest
 skills/                       # Skills from cockroachdb-skills submodule
-rules/                        # 4 rule sets (.mdc files)
+rules/                        # Rule sets (.mdc files)
+scripts/
+  setup-cockroachdb.sh        # Local multi-node cluster provisioning script
 mcp.json                      # MCP server definitions (Toolbox + Cloud MCP)
 tools.yaml                    # Toolbox source & tool configuration
 submodules/cockroachdb-skills # Shared skills submodule