Update dev workflow to build and test project

[Copilot]

Changes the dev workflow from its previous purpose (reading issues and posting poems) to building and testing the gh-aw project.

Changes

• Updated workflow instructions to run make build and make test
• Removed unnecessary config: issue_number input, issues: read permission, network.allowed, tools.github, safe-outputs
• Increased timeout from 5 to 15 minutes for build/test duration

New workflow content

# Build and Test Project

Build and test the gh-aw project to ensure code quality.

**Requirements:**
1. Run `make build` to build the binary (this handles Go module downloads automatically)
2. Run `make test` to run the test suite
3. Report any failures with details about what went wrong
4. If all steps pass, confirm the build and tests completed successfully

Original prompt

change the dev workflow's instruction to build and test this project

Custom agent used: agentic-workflows
GitHub Agentic Workflows (gh-aw) - Create, debug, and upgrade AI-powered workflows with intelligent prompt routing

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