docs: add a docstring for the last missing function Consul::with_local_config (#386)

Author: CommanderStorm

src/consul/mod.rs

@@ -28,11 +28,28 @@ pub struct Consul {
 }
 
 impl Consul {
-    // not having docs here is currently allowed to address the missing docs problem one place at a time. Helping us by documenting just one of these places helps other devs tremendously
-    #[allow(missing_docs)]
-    pub fn with_local_config(self, config: String) -> Self {
+    /// Passes a JSON string of configuration options to the Consul agent
+    ///
+    /// For details on which options are avalible, please see [the consul docs](https://developer.hashicorp.com/consul/docs/reference/agent/configuration-file).
+    ///
+    /// # Example
+    /// ```
+    /// use testcontainers_modules::{consul, testcontainers::runners::SyncRunner};
+    ///
+    /// let consul = consul::Consul::default()
+    ///     .with_local_config(
+    ///         r#"{
+    ///         "datacenter": "us_west",
+    ///         "server": true,
+    ///         "enable_debug": true
+    ///     }"#,
+    ///     )
+    ///     .start()
+    ///     .unwrap();
+    /// ```
+    pub fn with_local_config(self, config: impl ToString) -> Self {
         let mut env_vars = self.env_vars;
-        env_vars.insert(CONSUL_LOCAL_CONFIG.to_owned(), config);
+        env_vars.insert(CONSUL_LOCAL_CONFIG.to_owned(), config.to_string());
         Self { env_vars }
     }
 }