feat: cleanup removal of old ssh plexer and logic

we also have added the necessary logic to auto prune ephemeral nodes because
headscale doesn't seem to automatically remove them. this change made use of a database
which is now stored in the persistent headplane directory.

app/routes/acls/overview.tsx

@@ -66,8 +66,8 @@ export default function Page() {
 					The ACL policy mode is most likely set to <Code>file</Code> in your
 					Headscale configuration. This means that the ACL file cannot be edited
 					through the web interface. In order to resolve this, you'll need to
-					set <Code>policy.mode</Code> to <Code>database</Code> in your Headscale
-					configuration.
+					set <Code>policy.mode</Code> to <Code>database</Code> in your
+					Headscale configuration.
 				</Notice>
 			) : undefined}
 			<h1 className="text-2xl font-medium mb-4">Access Control List (ACL)</h1>