feat: add README (#17)

Added a new README.

README.md

@@ -24,3 +24,47 @@
 [docs-main]: https://prefix-dev.github.io/rattler_installs_packages
 [crates]: https://crates.io/crates/rattler_installs_packages
 [crates-badge]: https://img.shields.io/crates/v/rattler_installs_packages.svg
+
+
+`RIP` is a library that allows the resolving and installing of Python [PyPi](https://pypi.org/) packages from Rust into a virtual environment. 
+It's based on our experience with building [Rattler](https://github.com/mamba-org/rattler) and aims to provide the same
+experience but for PyPi instead of Conda.
+It should be fast and easy to use. Like Rattler, this library is not a package manager itself but provides the low-level plumbing to be used in one.
+
+`RIP` is based on the quite excellent work of [posy](https://github.com/njsmith/posy) and we have tried to credit
+the authors where possible.
+
+# Showcase
+
+Let's resolve the `flask` python package.
+We've added a small binary to showcase this:
+
+![flask-install](https://github.com/prefix-dev/rip/assets/417374/75826d3e-717d-45fa-bc79-3bd0dec713d5)
+
+This showcases the downloading and caching of metadata from PyPi. As well as the package resolution using our solver, more on this below.
+We cache everything in a local directory, so that we can re-use the metadata and don't have to download it again.
+
+## Features
+
+This is a list of current and planned features of `RIP`, the biggest are listed below:
+
+* [x] Downloading and aggressive caching of PyPi metadata.
+* [x] Resolving of PyPi packages using [Resolvo](https://github.com/mamba-org/resolvo).
+* [ ] Installation of wheel files (planned)
+* [ ] Support sdist files (planned)
+
+More intricacies of the PyPi ecosystem need to be implemented, see our GitHub issues for more details.
+
+
+# Solver
+
+We have integrated the stand-alone packaging SAT solver [Resolvo](https://github.com/mamba-org/resolvo), to resolve pypi packages.
+This solver is incremental and adds packaging metadata during resolution of the SAT problem.
+This feature can be enabled with the `resolvo-pypi` feature flag.
+
+
+## Contributing 😍
+
+We would love to have you contribute! 
+See the CONTRIBUTION.md for more info. For questions, requests or a casual chat, we are very active on our discord server. 
+You can [join our discord server via this link][chat-url].