New Feature: Add images for the wiki and edit links to point to it (#996)

* Add wiki images

* Update references to point to wiki

* Apply suggestions from code review

Co-authored-by: David Leal <halfpacho@gmail.com>

* Add import icomoon img

Co-authored-by: David Leal <halfpacho@gmail.com>

CONTRIBUTING.md

@@ -1,4 +1,7 @@
 <h1>Contributing to Devicon</h1>
+
+<h2>This guide has been converted to a <a href="https://github.com/devicons/devicon/wiki">Wiki</a>! This document will eventually be removed, please use the Wiki instead.</h2>
+<br>
 <p>
 First of all, thanks for taking the time to contribute! This project can only grow and live by your countless contributions. To keep this project maintainable, we have developed some guidelines for our contributors.
 </p>

README.md

@@ -156,12 +156,12 @@ Add css rules in your stylesheet
 
 <h2 id="request-icon">Requesting icon</h2>
 <p>
-    When you want to request a icon please feel feel to create a issue. See our <a href="/CONTRIBUTING.md#requestingIcon">contribution guidelines</a> for more information.
+    When you want to request an icon please feel free to create an issue. See our <a href="https://github.com/devicons/devicon/wiki/Requesting-an-Icon">Wiki</a> for more information.
 </p>
 
 <h2 id="contribute">Contributing</h2>
 <p>
-    We are happy for every contribution, whether it's new icons, features, or maintainers. Please have a look at our <a href="CONTRIBUTING.md">contribution guidelines</a> to see how you can contribute to this project.
+    We are happy with every contribution, whether it's new icons, features, or maintainers. Please have a look at our <a href="https://github.com/devicons/devicon/wiki">Wiki</a> to see how you can contribute to this project.
 </p>
 
 <h2 id="discord-server">Discord server</h2>