feat: ability to set changelog title using cli argument

[stanvit]

What does this do / why do we need it?

We would like to have a single git-chglog configuration and template for multiple projects and have
individual changelog title per project

How this PR fixes the problem?

The PR adds the --title cli argument that overrides the default info.title value if present

What should your reviewer look out for in this PR?

This works similarly to the --repository-url argument, the same approach and copied behaviour.

Check lists

• Test passed
• Coding style (indentation, etc)