feat(homelab): add dhcp lease parsing

nix/homelab/src/dns.rs

@@ -0,0 +1,20 @@
+use crate::{
+    error::Result,
+    lease_parser::{Lease, parse_leases},
+    transport::Transport,
+};
+
+pub struct Router<T: Transport> {
+    transport: T,
+}
+
+impl<T: Transport> Router<T> {
+    pub fn new(transport: T) -> Self {
+        Self { transport }
+    }
+
+    pub fn dhcp_leases(&self, resource: &str) -> Result<Vec<Lease>> {
+        let raw = self.transport.fetch(resource)?;
+        parse_leases(&raw).map_err(|e| crate::error::Error::Parse(e.to_string()))
+    }
+}