feat: Enhance load balancing strategies

[jkyberneees]

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[Copilot]

Pull Request Overview

This PR enhances the load balancing system by adding new load balancing strategies and improving existing functionality. The changes focus on providing more sophisticated load balancing algorithms for better performance and distribution.

• Adds three new load balancing strategies: power-of-two-choices (p2c), latency-based, and weighted-least-connections
• Improves health check configuration by allowing custom HTTP methods
• Enhances client IP detection for better session affinity and IP-based routing

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/load-balancer/http-load-balancer.ts	Core implementation of new load balancing algorithms and improved client IP detection
src/interfaces/load-balancer.ts	Interface updates to support new strategies and health check method configuration
README.md	Documentation updates describing the new load balancing algorithms
test/e2e/random-loadbalancer.test.ts	Test improvements changing toBeLessThan to toBeLessThanOrEqual for boundary conditions
test/cluster/fixtures/worker.ts	Minor code style fix removing trailing semicolon

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