Add comprehensive documentation, examples, and automated release workflow

[Copilot]

This PR implements a complete documentation and automation suite for TerminalEngineGo, transforming it from a library with just source code into a professionally documented and maintained open-source project.

📚 Documentation Added

README.md - A comprehensive project overview featuring:

• Dynamic version badges that track GitHub tags automatically
• Clear installation instructions and quick start guide
• Feature overview highlighting the library's capabilities
• Links to detailed documentation and examples

docs/ Directory - Complete documentation suite:

• getting-started.md - Step-by-step guide covering core concepts (Model-View-Update architecture), basic usage patterns, and next steps
• api-reference.md - Detailed API documentation for all public types, interfaces, and functions
• examples.md - Code snippets demonstrating common use cases and patterns

🎯 Working Examples

Added three fully functional examples in examples/ directory:

• hello-world/ - Minimal application showing basic library usage
• animation/ - Demonstrates the built-in Animation type with frame-based animations
• game/ - Interactive game with player movement and score tracking

Each example includes its own README, go.mod file, and builds successfully.

⚙️ GitHub Actions Automation

CI Workflow (.github/workflows/ci.yml):

• Tests across Go versions 1.22, 1.23, and 1.24
• Builds main library and all examples
• Includes linting with golangci-lint

Release Workflow (.github/workflows/release.yml):

• Triggers automatically on version tags (v*)
• Generates changelog from git commits between releases
• Creates GitHub releases with formatted changelog
• Updates CHANGELOG.md in the repository

📄 Project Infrastructure

• LICENSE - MIT License for clear usage terms
• CHANGELOG.md - Version history with structured changelog format
• .gitignore - Comprehensive ignore rules for Go projects and IDE artifacts

🧪 Testing

All components have been thoroughly tested:

• Main library builds successfully
• All three examples compile and run correctly
• GitHub Actions workflows validated
• Documentation links and formatting verified

This establishes TerminalEngineGo as a production-ready library with professional documentation, automated testing, and streamlined release processes. Users can now easily discover, learn, and contribute to the project.

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Tip

👮 Agentic pre-merge checks are now available in preview!

Pro plan users can now enable pre-merge checks in their settings to enforce checklists before merging PRs.

• Built-in checks – Quickly apply ready-made checks to enforce title conventions, require pull request descriptions that follow templates, validate linked issues for compliance, and more.
• Custom agentic checks – Define your own rules using CodeRabbit’s advanced agentic capabilities to enforce organization-specific policies and workflows. For example, you can instruct CodeRabbit’s agent to verify that API documentation is updated whenever API schema files are modified in a PR. Note: Upto 5 custom checks are currently allowed during the preview period. Pricing for this feature will be announced in a few weeks.

Please see the documentation for more information.

Example:

reviews:
  pre_merge_checks:
    custom_checks:
      - name: "Undocumented Breaking Changes"
        mode: "warning"
        instructions: |
          Pass/fail criteria: All breaking changes to public APIs, CLI flags, environment variables, configuration keys, database schemas, or HTTP/GraphQL endpoints must be documented in the "Breaking Change" section of the PR description and in CHANGELOG.md. Exclude purely internal or private changes (e.g., code not exported from package entry points or explicitly marked as internal).

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