docs: update README
fix: skip non-parsable manifests
refactor: default build_dir value is None
djoc is a command-line tool that allows you to write documents in the markup language Djot and build them into a PDF or an HTML page.
djoc aims to simplify the process of document preparation by providing a modern and user-friendly alternative to traditional TeX distributions. While TeX will always hold a special place in the world of academic writing, its archaic syntax and steep learning curve can be intimidating for many users. djoc aims to change that by utilizing a simpler and more intuitive markup language, and handling the complexity of TeX under the hood.