Generate changelog from the commit messages

[vdusek]

Generate CHANGELOG from the commit messages as we do in JS/TS projects.

Once this is solved for this repository, please create the same issue in the SDK, Client, and Shared Python repositories.

@vladfrangu suggested to explore https://github.com/orhun/git-cliff as a solution to this.

Edit: also check this discussion: https://github.com/apify/crawlee-py/pull/125#discussion_r1576067168