RenderCV is much more capable now!

I have worked on a new release of RenderCV during my free time for the past two months. With v1, I believe that RenderCV will be useful for many people.

There are three significant changes:

• The data model is much more flexible. There are no more predefined section names (section names are arbitrary now), and there is no need to use custom_sections anymore.
• The templating system has been changed so that you can move your $\LaTeX$ CV codes to RenderCV and create your custom $\LaTeX$ CV with it.
• Two new themes have been added. There are three themes now: classic, moderncv, and sb2nov.

README.md and the documentation are entirely rewritten. If you want to find out more about v1, you can read them.

Full Changelog: [v0.10...v1.1]

Added

• RenderCV is now a $\LaTeX$ CV framework. Users can move their $\LaTeX$ CV themes to RenderCV to produce their CV from RenderCV's YAML input.
• RenderCV now generates Markdown and HTML versions of the CV to allow users to paste the content of the CV to another software (like Grammarly) for spell checking.
• A new theme has been added: moderncv.
• A new theme has been added: sb2nov.

Changed

• The data model has been changed to be more flexible. All the sections are now under the sections field. All the keys are arbitrary and rendered as section titles. The entry types can be any of the six built-in entry types, and they will be detected by RenderCV for each section.
• The templating system has been changed completely.
• The command-line interface (CLI) has been improved.
• The validation error messages have been improved.
• TinyTeX has been moved to another repository, and it is being pulled as a Git submodule. It is still pushed to PyPI, but it's not a part of the repository anymore.
• Tests have been improved, and it uses pytest instead of unittest.
• The documentation has been rewritten.
• The reference has been rewritten.
• The build system has been changed from setuptools to hatchling.