Support SSH URLs with port numbers and improve validation

[juev]

The main changes are:

• Update SSH URL regex to handle URLs with port numbers (e.g. ssh://user@host:port/path)
• Add support for ~ character in valid repo path pattern
• Improve URL format detection efficiency by using string prefix checks
• Fix regex group handling for SSH URLs with optional port number
• Add test cases for alternative SSH URL formats

The commit focuses on improving SSH URL handling while maintaining security validation.

[Copilot]

Pull Request Overview

Enhances SSH URL parsing to support port numbers and improves repository URL validation. The changes modernize URL format detection and add comprehensive test coverage for different SSH URL formats.

• Updated SSH URL regex to handle port numbers in ssh://user@host:port/path format
• Added support for tilde character in repository path validation
• Improved URL format detection using efficient string prefix checks

Reviewed Changes

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

File	Description
main.go	Updates SSH regex pattern to support port numbers, improves URL detection logic with prefix checks, and adjusts regex group handling
main_test.go	Adds test cases for URL detection function and includes test for domain with port numbers

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