(docs): overhaul documentation (#76)

Updated for latest Org-roam, and add all relevant information into the new documentation site.

doc/graph_setup.md

@@ -0,0 +1,39 @@
+The setup is similar to that of org-protocol. Here `roam://` links are
+defined, and need to be associated with an application. 
+
+The gist of the setup is setting up a Bash script to trim off the
+`roam://` prefix from the link, causing the desktop application to
+call `emacsclient path/to/org-roam-file.org`.
+
+## Setting Up for Linux
+
+Create a desktop application. I place mine in
+`~/.local/share/applications/roam.desktop`:
+
+```
+[Desktop Entry]
+Name=Org-Roam Client
+Exec=/home/jethro/.local/bin/launch_emacs %u
+Icon=emacs-icon
+Type=Application
+Terminal=false
+MimeType=x-scheme-handler/roam
+```
+
+Note the `Exec` key is set to a bash script poorly named
+`launch_emacs`. You can set it to whatever you want.
+
+Create the corresponding bash script, and make it executable. Here's
+how it looks like:
+
+```bash
+#!/usr/bin/env bash
+emacsclient "${1#*:}"
+```
+
+Finally, associate `roam://` links with the desktop application by
+running in your shell:
+
+```bash
+xdg-mime default roam.desktop x-scheme-handler/roam
+```