chore: set up oranda

Sets up oranda so we can get nice website things for free. Some caveats we have right now:

- Absolutely manual, I have to do `oranda build` and the deploy manually right now
- I had to pop the Readme into a new Markdown file because the first header in there was looking very strange

.gitignore

@@ -11,3 +11,7 @@ rust-project.json
 !.vscode/extensions.json
 *.iml
 *.o
+public/
+
+# Local Netlify folder
+.netlify