Initialize VitePress

- Add theme submodule
- Add initial configuration files
- Override theme-default VPHero/VPFooter with custom theme version
- Update README

README.md

@@ -7,10 +7,10 @@ https://3ds.hacks.guide/
 ## Running the site locally
 
 This requires the following installed on your system:
-- ruby(-dev)
-- bundler
+- node.js
 
 To test the website locally, clone the source code:
+
 ```sh
 git clone https://github.com/hacks-guide/Guide_3DS --recurse-submodules
 cd Guide_3DS
@@ -19,9 +19,8 @@ cd Guide_3DS
 Then simply run the following commands:
 
 ```sh
-bundle config set --local path vendor/bundle
-bundle install
-bundle exec jekyll serve
+npm ci
+npm run docs:dev
 ```
 
-The website should now be running on http://127.0.0.1:4000/.
+The website should now be running on http://127.0.0.1:5173/ (or a port shown on the terminal).