docs: move docs from wiki to docs folder & add an image for docs

docs/README.md

@@ -0,0 +1,17 @@
+<h1 align="center"><img src="../images/websurfx_docs_image.png" alt="Websurfx Docs" align="center"></h1>
+
+# General
+
+- [Introduction](./introduction.md)
+- [**FAQ**](./faq.md)
+
+# Users
+
+- [Installation](./installation.md)
+- [Configuration](./configuration.md)
+- [Theming](./theming.md)
+
+# Developers
+
+- [**Contribute**](https://github.com/neon-mmd/websurfx/blob/master/CONTRIBUTING.md)
+- [**Coding style**](https://rust-lang.github.io/api-guidelines/naming.html)