Add Actix Web example demonstrating Gatehouse integration

[hardbyte]

Summary

• add an Actix Web example that wires Gatehouse policies into handlers
• add the Actix Web dev-dependency and register the example for docs.rs
• document the new example alongside existing samples in the README

Testing

• cargo test

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https://chatgpt.com/codex/tasks/task_b_68e494f4eae0832994895c9420434c71

[Copilot]

Pull Request Overview

The PR adds an Actix Web example demonstrating Gatehouse policy integration alongside the existing Axum example. It introduces a complete Actix Web implementation with handlers for blog post operations (edit, publish, view) protected by Gatehouse policies.

• Adds a new Actix Web example with complete policy integration for blog post management
• Updates the existing Axum example to use header-based authentication for improved testing
• Adds comprehensive test suites for both examples to validate policy enforcement

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
examples/actix_web.rs	New Actix Web example with blog post handlers and Gatehouse policies
examples/axum.rs	Updated to use header-based authentication and enhanced testing scenarios
tests/actix_example.rs	Test suite for the Actix Web example validating policy enforcement
tests/axum_example.rs	Test suite for the Axum example with comprehensive scenario coverage
Cargo.toml	Added actix-web dependency and registered the new example for docs.rs
README.md	Updated to document both Axum and Actix Web integration examples

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