feat: begin writing roseate section in apps

Author: THEGOLDENPRO

docs/apps/index.md

@@ -1,2 +1,3 @@
 # Applications
-<s>meow</s> WIP!
+
+- 🌹 [Roseate](./roseate/index.md) - *Our fast, GPU accelerated and cross-platform image viewer...*

docs/apps/roseate/application_launcher.png

@@ -0,0 +1,43 @@
+# 🌹 Roseate
+![showcase image](./showcase_1.png)
+
+!!! warning
+    If you're looking for an [installation guide](./installation.md), there isn't one at the moment because Roseate is still <ins>**work in progress**</ins> and has not released yet.
+
+> Roseate is a **free** and **open-source**, GPU accelerated, cross-platform and simplistic image viewer that's highly configurable and fast.
+
+Being a cloudy-org application, it naturally follows the [Cloudy Philosophy](https://github.com/cloudy-org/.github/blob/main/philosophy.md).
+
+It's designed to be **lightweight**, **privacy-respecting** and **stupidly fast** to launch and display images.
+
+![placeholder image]()
+
+## Background
+Roseate has been a passion project for [me](https://devgoldy.xyz) to learn the 🦀 Rust programming language, while also laying the groundwork for shared infrastructure across cloudy-org (like the [cirrus](https://github.com/cloudy-org/cirrus) tool-kit).
+
+## How to use?
+!!! info
+    At the moment this wiki assumes you're on Linux, support for other platforms (Windows & MacOS) is work in progress and half-baked. If you're on these platforms and you're happy to help, we'll be very grateful if you can compile the image viewer and [report your issues to us](https://github.com/cloudy-org/roseate/issues). Additionally edits to [this wiki](https://github.com/cloudy-org/wiki/edit/main/docs/apps/roseate/index.md) would be great.
+
+Welcome to this quick guide on how to use the Roseate image viewer. **It's simple!**
+
+### Launching the image viewer
+Roseate can be launched in **3** primary ways, [if setup correctly](./setup.md):
+
+1) Your terminal, by executing the binary.
+
+```sh title="terminal"
+roseate
+```
+
+2) Through your application launcher (or start menu).
+
+![application launcher](./application_launcher.png)
+
+3) Or by clicking an image.
+
+![launch with image](./launch_with_image.png)
+
+<br>
+
+***THIS WIKI IS STILL WIP...***

docs/apps/roseate/index.md

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   - search
   - section-index
 
+markdown_extensions:
+  - admonition
+  - pymdownx.details
+  - pymdownx.superfences
+
 theme:
   name: material
   logo: assets/clouds.png
   favicon: assets/clouds.png
   icon:
     repo: octicons/git-merge-16
   font:
-    text: Roboto Mono
+    text: Roboto
   palette:
     scheme: slate
     primary: red