feat(test): adds findAvailablePort for test server

[Aliaksie]

adds utility method to findAvailablePort for tests

Has This Been Tested?

yes

Breaking Changes

no

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[tzolov]

Thanks @Aliaksie ,
In the future could you please pull rebase rather than merge with master (e.g. use something like git pull -r origin main) .

[tzolov]

Cheery-picked, rebased, moved the TestUtils to the mcp-test.
merged at 263e374

[Aliaksie]

Thanks @Aliaksie , In the future could you please pull rebase rather than merge with master (e.g. use something like git pull -r origin main) .

Hey @tzolov , Thanks for letting me know about this, I didn't know about this rule... I'll follow it now!