Incomplete test coverage for MarkBind CLI commands

[AgentHagu]

Please confirm that you have searched existing issues in the repo

Yes, I have searched the existing issues

Any related issues?

#2620, #2617, #1825

Tell us about your environment

Windows 10

MarkBind version

5.5.3

Describe the bug and the steps to reproduce it

Currently, test cases are implemented for only a few of MarkBind's CLI commands: init and build. However, other commands such as serve and deploy lack dedicated test cases, which leaves gaps in our test coverage.

Adding test cases for these commands will:

• Improve test coverage for the CLI
• Improve code stability by detecting potential regressions
• Enhance DevOps workflows, making it easier to catch issues during development and deployment

Filling in these gaps will also make the codebase more maintainable and help prevent future bugs or overlooked edge cases.

Expected behavior

No response

Anything else?

No response

[gerteck]

Somewhat related to #2106 - Add more unit tests for core package