docs: document dotfiles (#44)

Add dotfiles to configuration options page

src/content/docs/configuration/config.mdx

@@ -450,3 +450,35 @@ common_prefix = [
 ```
 
 Configures commands that should be totally stripped from stats calculations. For example, 'sudo' should be ignored.
+
+### `dotfiles`
+Atuin version: >= 18.1
+
+Default: false
+
+To enable sync of shell aliases between hosts. Requires `sync` enabled.
+
+Add the new section to the bottom of your config file, for every machine you use Atuin with
+
+```
+[sync]
+records = true
+
+[dotfiles]
+enabled = true
+```
+
+Manage aliases using the command line options
+
+```
+# Alias 'k' to 'kubectl'
+atuin dotfiles alias create k kubectl
+
+# List all aliases
+atuin dotfiles alias list
+
+# Delete an alias
+atuin dotfiles alias delete k
+```
+
+After setting an alias, you will either need to restart your shell or source the init file for the change to take affect