add: horizontal rules

Author: momeemt

src/lib.rs

@@ -6,4 +6,5 @@ pub mod headings;
 pub mod italic;
 pub mod list;
 pub mod quote;
+pub mod rules;
 pub mod strike;

src/rules.rs

@@ -0,0 +1,20 @@
+use brack_sdk_rs::{MetaData, Type, Value};
+use extism_pdk::{plugin_fn, FnResult, Json, WithReturnCode};
+
+#[plugin_fn]
+pub fn metadata_rules() -> FnResult<Json<MetaData>> {
+    Ok(Json(MetaData {
+        command_name: "---".to_string(),
+        call_name: "rules".to_string(),
+        argument_types: vec![],
+        return_type: Type::TBlock,
+    }))
+}
+
+#[plugin_fn]
+pub fn rules(Json(args): Json<Vec<Value>>) -> FnResult<String> {
+    if args.len() != 0 {
+        return Err(WithReturnCode::new(anyhow::anyhow!("Usage: {{std.---}}"), 1));
+    }
+    Ok(String::from("<hr />"))
+}