Implement dig command

@@ -0,0 +14,4 @@
+    pub fn new(server: Option<String>) -> anyhow::Result<Self> {
+        let resolver = if let Some(server) = server {
+            let mut resolver_config = ResolverConfig::new();
+            let nserver = format!("{server}:53").parse().expect("Failed to parse DNS server address");

@@ -0,0 +29,4 @@
+    async fn execute(&self, msg: CommandContext) -> anyhow::Result<String> {
+        if let Some(msg) = msg.content {
+            let mut builder = String::new();
+            let parts = msg.split_ascii_whitespace().collect::<Vec<&str>>();