docs: add alshedivat as a contributor for design, code (#751)

* docs: update README.md [skip ci]

* docs: create .all-contributorsrc [skip ci]

* Update .all-contributorsrc

* Update README.md

* Update .all-contributorsrc

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Maruan Al-Shedivat <maruan@genesistherapeutics.ai>

.all-contributorsrc

@@ -0,0 +1,25 @@
+{
+  "files": ["README.md"],
+  "imageSize": 100,
+  "commit": false,
+  "contributorsPerLine": 7,
+  "projectName": "al-folio",
+  "projectOwner": "alshedivat",
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "badgeTemplate": "[core_contributors]: https://img.shields.io/badge/core_contributors-<%= contributors.length %>-orange.svg 'Number of core contributors'",
+  "contributorTemplate": "<a href=\"<%= contributor.profile %>\"><img src=\"<%= contributor.avatar_url %>\" width=\"<%= options.imageSize %>px;\" alt=\"\"/><br /><sub><b><%= contributor.name %></b></sub></a>",
+  "skipCi": true,
+  "contributors": [
+    {
+      "login": "alshedivat",
+      "name": "Maruan",
+      "avatar_url": "https://avatars.githubusercontent.com/u/2126561?v=4",
+      "profile": "http://maruan.alshedivat.com",
+      "contributions": [
+        "design",
+        "code"
+      ]
+    }
+  ]
+}

README.md

@@ -1,13 +1,16 @@
 # al-folio
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[core_contributors]: https://img.shields.io/badge/core_contributors-1-orange.svg 'Number of core contributors'
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![deploy](https://github.com/alshedivat/al-folio/actions/workflows/deploy.yml/badge.svg)](https://github.com/alshedivat/al-folio/actions/workflows/deploy.yml)
 [![demo](https://img.shields.io/badge/theme-demo-brightgreen.svg)](https://alshedivat.github.io/al-folio/)
 [![GitHub contributors](https://img.shields.io/github/contributors/alshedivat/al-folio.svg)](https://github.com/alshedivat/al-folio/graphs/contributors/)
+[![Core Contributors][core_contributors]](#core-contributors-)
 [![GitHub release](https://img.shields.io/github/v/release/alshedivat/al-folio)](https://github.com/alshedivat/al-folio/releases/latest)
 [![GitHub license](https://img.shields.io/github/license/alshedivat/al-folio?color=blue)](https://github.com/alshedivat/al-folio/blob/master/LICENSE)
 [![GitHub stars](https://img.shields.io/github/stars/alshedivat/al-folio)](https://github.com/alshedivat/al-folio)
 [![GitHub forks](https://img.shields.io/github/forks/alshedivat/al-folio)](https://github.com/alshedivat/al-folio/fork)
-[![support](https://img.shields.io/badge/support-Ko--fi-yellow.svg)](https://ko-fi.com/alshedivat)
 
 A simple, clean, and responsive [Jekyll](https://jekyllrb.com/) theme for academics.
 If you like the theme, give it a star!
@@ -401,10 +404,28 @@ Before you get started, please take a look at [the guidelines](CONTRIBUTING.md).
 If you would like to improve documentation, add your webpage to the list below, or fix a minor inconsistency or bug, please feel free to send a PR directly to `master`.
 For more complex issues/bugs or feature requests, please open an issue using the appropriate template.
 
+## Core Contributors ✨
+
+Many thanks to wonderful people who have made substantial contributions to al-folio ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="http://maruan.alshedivat.com"><img src="https://avatars.githubusercontent.com/u/2126561?v=4?s=100" width="100px;" alt="" style="border-radius: 50%;"/><br /><sub><b>Maruan</b></sub></a><br /><a href="#design-alshedivat" title="Design">🎨</a> <a href="https://github.com/alshedivat/al-folio/commits?author=alshedivat" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
 
 ## License
 
 The theme is available as open source under the terms of the [MIT License](https://github.com/alshedivat/al-folio/blob/master/LICENSE).
 
 Originally, **al-folio** was based on the [\*folio theme](https://github.com/bogoli/-folio) (published by [Lia Bogoev](https://liabogoev.com) and under the MIT license).
 Since then, it got a full re-write of the styles and many additional cool features.
+