config: Add new config keys

amethyst/config.mdx

@@ -6,6 +6,8 @@ title: Config Keys
 | Key | Description | Default |
 | --- | --- | --- |
 | `pacdiff_warn` | Whether to warn the user about `vimdiff` for `pacdiff` | `true` |
+| `paccache_keep` | How many versions (amount of times a package has been downloaded to the cache) of a package you want to keep in the cache | `0` |
+| `paccache_keep_ins_pkgs` | Exclude installed packages from getting cleared out of the cache | `true` |
 
 ## [extra]
 | Key | Description | Default |