docs: add paper info (#49)

Author: AngryMaciek

CITATION.cff

@@ -0,0 +1,29 @@
+cff-version: "1.2.0"
+authors:
+- family-names: Bak
+  given-names: Maciek
+  orcid: "https://orcid.org/0000-0003-1361-7301"
+doi: 10.5281/zenodo.7938823
+message: If you use this software, please cite our article in the
+  Journal of Open Source Software.
+preferred-citation:
+  authors:
+  - family-names: Bak
+    given-names: Maciek
+    orcid: "https://orcid.org/0000-0003-1361-7301"
+  date-published: 2023-05-15
+  doi: 10.21105/joss.05272
+  issn: 2475-9066
+  issue: 85
+  journal: Journal of Open Source Software
+  publisher:
+    name: Open Journals
+  start: 5272
+  title: "Hypercomplex: abstract & fast header-only C++ template library
+    for lattice-based cryptosystems in high-dimensional algebras"
+  type: article
+  url: "https://joss.theoj.org/papers/10.21105/joss.05272"
+  volume: 8
+title: "Hypercomplex: abstract & fast header-only C++ template library
+  for lattice-based cryptosystems in high-dimensional algebras"
+

README.md

@@ -6,8 +6,7 @@
 [![build](https://github.com/AngryMaciek/hypercomplex/workflows/cpplint/badge.svg?branch=master)](https://github.com/AngryMaciek/hypercomplex/actions?query=workflow%3Acpplint)
 [![CodeFactor](https://www.codefactor.io/repository/github/angrymaciek/hypercomplex/badge)](https://www.codefactor.io/repository/github/angrymaciek/hypercomplex)
 [![docs](https://github.com/AngryMaciek/hypercomplex/workflows/docs/badge.svg?branch=master)](https://github.com/AngryMaciek/hypercomplex/actions?query=workflow%3Adocs)
-[![GitHub issues](https://img.shields.io/github/issues/AngryMaciek/hypercomplex)](https://github.com/AngryMaciek/hypercomplex/issues)
-[![GitHub license](https://img.shields.io/github/license/AngryMaciek/hypercomplex)](https://github.com/AngryMaciek/hypercomplex/blob/master/LICENSE)
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.05272/status.svg)](https://doi.org/10.21105/joss.05272)
 
 <img src="img/logo.png" alt="drawing" height="30"/>
 
@@ -17,7 +16,7 @@ high-dimensional algebras.
 
 Full documentation & API are available at [this link](https://angrymaciek.github.io/hypercomplex).  
 Please refer to the [contributing guidelines](CONTRIBUTING.md) if you are interested in contributing to this repository.  
-Please mind the [code of conduct](CODE_OF_CONDUCT.md) for all interactions with the community.  
-For suggestions regarding the code please use the [issue tracker](https://github.com/AngryMaciek/hypercomplex/issues).  
+
+The following work has been [published in the Journal of Open Source Software](https://joss.theoj.org/papers/10.21105/joss.05272).
 
 _© 2020 Maciej Bak_