Introduce a tool to bump all version strings across project before release

[thomas-maschler]

Introduce a tool and allow to automatically bump version via CI before a release based on the release tag.

Before a release, we always need to manually update version strings in multiple places across the project. This is very error-prone.
There are many tools out there for example bump2version
https://github.com/developmentseed/titiler/blob/main/.bumpversion.cfg