docs: port to VitePress

Things that happen in this shameless squash:
- Removed 404 page
  - It doesn't work in VitePress and making it work in VitePress needs
    some invasive hack in the theme that I'm not willing to do
  - The default is more than enough, though
- Moved consoleVersionSelect include to another directory
  - This avoids being uploaded to Crowdin for translation
- Inline all SafeB9SInstaller includes
  - Not only do parameterized includes not work, but if/else statements
    don't work at all
- The sysupdate include parameter hasn't been used since MSET9, so it
  actually works just fine without any parameters. Hooray(?)
- Move mset9-chorus to an include, that logic doesn't work in VitePress
- Removed Get Started button from homepage, it breaks translations
- Tables in get-started are now shown by default; it seems VitePress really does
  not want us to use inline script. So we cannot enable it upon
  realizing that the browser is JS capable
- Include parameters are now in frontmatter to allow translation
- Hacked in a bunch of CSS values kanged from the old theme to make it
  look not stupid
- Drop headers down one level to make table of contents work

docs/formatting-sd-(mac).md

@@ -1,10 +1,6 @@
----
-title: "Formatting SD (Mac)"
----
+# Formatting SD (Mac)
 
-{% include toc title="Table of Contents" %}
-
-### Required Reading
+## Required Reading
 
 This is an add-on section for formatting an SD card to work with the 3DS.
 
@@ -12,9 +8,9 @@ If the 3DS already recognizes the SD card, this guide is not required.
 
 This page is for Mac users only. If you are not on Mac, check out the [Formatting SD (Windows)](formatting-sd-(windows)) or [Formatting SD (Linux)](formatting-sd-(linux)) pages.
 
-### Instructions
+## Instructions
 
-#### OS X El Capitan (10.11) and later
+### OS X El Capitan (10.11) and later
 
 1. Insert your SD card into your computer
 1. If the SD card has any files and folders on it, copy everything to a folder on your computer
@@ -22,8 +18,11 @@ This page is for Mac users only. If you are not on Mac, check out the [Formattin
 1. In the top-left "View" menu, choose "Show All Devices"
 1. Select your SD card in the left panel
 
+    ::: danger
+
     Make sure you choose the correct device, otherwise you might accidentally erase the wrong drive!
-    {: .notice--danger}
+
+    :::
 
 1. Click "Erase" at the top
 1. Enter anything for "Name"
@@ -35,15 +34,18 @@ This page is for Mac users only. If you are not on Mac, check out the [Formattin
 1. Click "Close"
 1. If the SD card had any files and folders on it before the format, copy everything back from your computer
 
-#### OS X Yosemite (10.10) and earlier
+### OS X Yosemite (10.10) and earlier
 
 1. Insert your SD card into your computer
 1. If the SD card has any files and folders on it, copy everything to a folder on your computer
 1. Run the Disk Utility app
 1. Select your SD card in the left panel
 
+    ::: danger
+
     Make sure you choose the correct device, otherwise you might accidentally erase the wrong drive!
-    {: .notice--danger}
+
+    :::
 
 1. Click "Partition" at the top
     + If "Partition" does not appear, make sure to choose the device instead of a volume
@@ -59,7 +61,7 @@ This page is for Mac users only. If you are not on Mac, check out the [Formattin
 1. Close Disk Utility
 1. If the SD card had any files and folders on it before the format, copy everything back from your computer
 
-### Troubleshooting
+## Troubleshooting
 
 * SD card remains undetected by console or continues to display the wrong capacity after formatting
     + Your SD card may be partitioned or have unallocated space. Follow the instructions [here](https://wiki.hacks.guide/wiki/SD_Clean/Mac) to reformat your SD card.