Add installation instructions for WSL / Desktop

[Zertsov]

Problem

The docs currently don't give a great guide for getting Dioxus to work with WSL.

Steps To Reproduce

Steps to reproduce the behavior:

• Run cargo install dioxus-cli@0.5.0
• Run dx new
• Select Desktop and Tailwind options
• Note that the selections in the screenshot below don't actually lead anywhere, and options from Desktop and below have no content either
• Attempt dx serve --hot-reload --platform desktop - there will (probably) be many errors

Expected behavior

Clearer, or any, instructions on how to get Dioxus running on WSL. Also, more details on how to use Desktop or the other web renderers.

Screenshots

Environment:

• Dioxus version: v0.5
• Rust version: rustc 1.77.2 (25ef9e3d8 2024-04-09)
• OS info: Windows (WSL 2)
• App platform: desktop

Questionnaire

• [x] I'm interested in fixing this myself but don't know where to start
• [ ] I would like to fix and I have a solution
• [x] I don't have time to fix this right now, but maybe later

[Zertsov]

Here's the series of steps / commands I ran to get things (mostly) up and running, assuming we are past the dx new step:

1. dx serve --hot-reload --platform desktop (For brevity sake, when I say "serve" going forward, I mean this command)
2. rustup update
3. serve
4. sudo apt update
5. sudo apt-get install librust-atk-dev
6. serve
7. sudo apt install pkg-config libdbus-1-dev libgtk-3-dev libsoup2.4-dev libjavascriptcoregtk-4.0-dev libwebkit2gtk-4.0-dev
8. sudo apt-get update
9. serve
10. add the export DISPLAY=:0 to profile
11. serve
12. sudo apt-get install libxdo-dev
13. serve <-- Now works

[Zertsov]

Another note - even after all this, there are still permission errors when running this:

Connected to hot reloading 🚀
libEGL warning: failed to open /dev/dri/renderD128: Permission denied

libEGL warning: failed to open /dev/dri/card0: Permission denied

** (dioxus-desktop:6506): WARNING **: 14:35:10.523: webkit_settings_set_enable_offline_web_application_cache is deprecated and does nothing.
libEGL warning: failed to open /dev/dri/renderD128: Permission denied

libEGL warning: failed to open /dev/dri/card0: Permission denied