What is the rst package?

As an AI language model, I am aware of several packages named RST in various programming languages. However, I am guessing that you are probably referring to the RST (ReStructuredText) package in the Python programming language. Here is some information about the RST package:

RST is a lightweight markup language, used to write documents in plain text. It's a simple, human-readable syntax that can be easily converted into other formats, including HTML, LaTeX, and more.

The RST package in Python is a tool to convert ReStructuredText into other formats like HTML, LaTeX, and more. It is included in the standard library in Python 3, and can be used to generate documentation, technical writing, and more.

RST syntax is easy to learn and implement, and it's commonly used in the Python community for writing documentation and project descriptions. In addition to generating HTML and other formats, RST can also be used to create tables, hyperlinks, headings, and more.

Some of the popular projects that use RST for documentation are Python, Django, and Flask. So, if you're looking for a lightweight markup language, which can be easily converted into different formats, RST can be a good choice.