Add GitHub Actions workflow for linting

[Copilot]

This PR adds a comprehensive GitHub Actions workflow to automatically run linting and code quality checks on pull requests and pushes to the main branch.

What's Added

The new workflow (.github/workflows/lint.yml) includes:

• ESLint - Catches code quality issues and enforces coding standards
• Prettier - Ensures consistent code formatting across the project
• TypeScript Build - Verifies there are no compilation errors

Workflow Features

• Runs on Node.js 18 with npm caching for fast dependency installation
• Triggered on pushes to main and all pull requests
• Uses latest GitHub Actions (@v4) for security and reliability
• Fails fast if any linting issues are detected

Additional Changes

Fixed existing Prettier formatting issues in src/services/github.ts to ensure the workflow passes. These were minor formatting improvements (line wrapping for long console.log statements) that align with the project's Prettier configuration.

Benefits

• Early Issue Detection: Catches linting and formatting issues before code review
• Consistent Code Style: Enforces the existing ESLint and Prettier rules automatically
• Build Verification: Ensures TypeScript compilation succeeds on all changes
• Zero Configuration: Uses the existing linting setup already configured in package.json

The workflow leverages all the linting tools already documented in the README's development section, providing automated enforcement of the project's existing code quality standards.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add a basic GitHub Actions workflow for linting</issue_title>
<issue_description>We should setup GitHub Actions with a few simple linters to help spot potential issues earlier.</issue_description>

<agent_instructions>Let's create a GitHub Actions workflow for the existing checkers/linters</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes #2

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[ChrisTimperley]

This looks great. Thanks! 🙌🏻