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/flashing-ntrboot-(dsi).md

@@ -1,19 +1,18 @@
----
-title: "Flashing ntrboot (DSi)"
----
+# Flashing ntrboot (DSi)
 
-{% include toc title="Table of Contents" %}
-
-### Required Reading
+## Required Reading
 
 Before proceeding, ensure you have read all of the information on [ntrboot](ntrboot)
 
 This method requires temporary access to a Nintendo DSi that is compatible with your flashcart. This method uses the flashcart to run the ntrboot flasher `.nds` file on your DSi. This means that your flashcart must support launching `.nds` files on your DSi's version. See the flashcart table on [ntrboot](ntrboot) for more information.
 
-Note that in some rare circumstances, it may be possible for the flashing process to **brick** a counterfeit flashcart and render it permanently unusable. This is unlikely, but nevertheless, only original listed flashcarts are supported. To reduce the chance of receiving a counterfeit card, it is recommended that you use a reputable site to buy your flashcart (such as [NDS Card](https://www.nds-card.com/)).
-{: .notice--danger}
+::: danger
 
-### What You Need
+Note that in some rare circumstances, it may be possible for the flashing process to **brick** a counterfeit flashcart and render it permanently unusable. This is unlikely, but nevertheless, only original listed flashcarts are supported. To reduce the chance of receiving a counterfeit card, it is recommended that you use a reputable site to buy your flashcart (such as [NDS Card](https://www.nds-card.com/)).
+
+:::
+
+## What You Need
 
 * Your ntrboot compatible flashcart
 * Two consoles
@@ -21,9 +20,9 @@ Note that in some rare circumstances, it may be possible for the flashing proces
     * **The target 3DS**: the 3DS family console on stock firmware
 * The latest release of [ds_ntrboot_flasher](https://github.com/ntrteam/ds_ntrboot_flasher/releases/latest) (`ds_ntrboot_flasher_dsi.nds`)
 
-### Instructions
+## Instructions
 
-#### Section I - Prep Work
+### Section I - Prep Work
 
 1. Power off **the source DSi**
 1. Insert your flashcart's SD card into your computer
@@ -31,7 +30,7 @@ Note that in some rare circumstances, it may be possible for the flashing proces
 1. Reinsert your flashcart's SD card back into your flashcart
 1. Insert your ntrboot compatible DS / DSi flashcart into **the source DSi**
 
-#### Section II - Flashing ntrboot
+### Section II - Flashing ntrboot
 
 1. Launch `ds_ntrboot_flasher_dsi.nds` on **the source DSi** using your flashcart
 1. Press (A) to continue
@@ -44,5 +43,8 @@ Note that in some rare circumstances, it may be possible for the flashing proces
 
 ___
 
-### Continue to [Installing boot9strap (ntrboot)](installing-boot9strap-(ntrboot))
-{: .notice--primary}
+::: tip
+
+Continue to [Installing boot9strap (ntrboot)](installing-boot9strap-(ntrboot))
+
+:::