docs: add agent rules example to README

[Deepak7704]

Summary

• Add a new "Agent Rules Example" section to the README
• Demonstrates how to configure agentRules for project-specific coding conventions
• Provides a concrete example showing inline rules that are automatically included in every agent prompt

Test plan

• README renders correctly with new example section
• YAML example uses valid configuration fields from ProjectConfig schema

Closes #650

[Copilot]

Pull request overview

Adds a new documentation section to the README intended to show how to configure GraphQL request batching in agent-orchestrator.yaml.

Changes:

• Added a “GraphQL Batching Example” section under Configuration
• Included a YAML snippet demonstrating batchQueries, maxBatchSize, and batchInterval

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

The README introduces projects.<id>.settings.graphql with batchQueries/maxBatchSize/batchInterval and claims the orchestrator will batch GraphQL requests, but these keys don’t appear to exist in the current configuration schema (e.g., ProjectConfig in packages/core/src/types.ts and agent-orchestrator.yaml.example don’t define a settings or graphql section). As written, this example will likely produce an “unknown config key”/validation error and mislead users. Please either (1) update the example to use real, supported config fields, or (2) land the corresponding config + implementation changes and add the new fields to the schema/example config before documenting them here.

Suggested change

	### GraphQL Batching Example
	For projects that use GraphQL, you can configure the orchestrator to batch related queries and mutations for efficiency:
	```yaml
	# agent-orchestrator.yaml
	projects:
	my-graphql-app:
	repo: owner/my-graphql-app
	path: ~/my-graphql-app
	defaultBranch: main
	settings:
	graphql:
	batchQueries: true
	maxBatchSize: 10
	batchInterval: 100ms
	```
	This configuration enables automatic batching of GraphQL requests when the agent interacts with your GraphQL API, reducing network overhead and improving performance.

[Deepak7704]

Thanks for catching that! I've updated the example to use a valid agentRules configuration field that exists in the ProjectConfig schema. The new example demonstrates how to define agent-specific coding conventions that will be included in every agent prompt.