Router performance enhancements

[n0nag0n]

Just was thinking with AI about how to increase the performance out of Flight. The router class can instead search by method instead of everything. It helps shave off about 5% of execution time if your project is large enough. Otherwise it's negligible.

[Copilot]

Pull Request Overview

This PR enhances router performance by implementing method-based route grouping to optimize route lookup times. The optimization creates separate arrays grouped by HTTP method, allowing the router to search only relevant routes instead of iterating through all routes.

• Introduces a new $routesByMethod array to group routes by HTTP method for faster lookups
• Modifies the routing algorithm to check method-specific routes first, then fall back to wildcard routes
• Maintains backward compatibility for existing routing behavior including 405 error handling

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
flight/net/Router.php	Implements method-based route grouping with fast-path lookup optimization
tests/EngineTest.php	Adds comprehensive tests for route iteration behavior and edge cases
tests/performance/index.php	Creates performance testing environment with various route types
tests/performance/performance_tests.sh	Provides benchmarking script for measuring routing performance