Add rules for AI auto review to follow (#70)

* add auto review rules

Author: vistaarjuneja

.harness/rules/review.md

@@ -0,0 +1,5 @@
+1. Ensure the names of tools are not ambiguous and do not conflict with existing names
+2. Ensure the descriptions are clear and suggest better descriptions if not well written. Ensure descriptions are not ambiguous.
+3. Analyze the parameters for the tools and look for parameters which are machine data that will be hard for LLMs to interpret
+4. Whenever you see request parameter fields in tool handlers which are strings with defined values, suggest to use `mcp.Enum` to track those.
+5. Make sure we use defined methods like `mcp.NewToolResultError` to return errors from functions that return `mcp.CallToolRequest`