feat: parse commmand ids from comments

src/generator/utils.rs

@@ -0,0 +1,27 @@
+use protobuf::descriptor::{FileDescriptorProto, source_code_info::Location};
+
+pub struct SourceContext<'a> {
+    location_map: std::collections::HashMap<Vec<i32>, &'a Location>,
+}
+
+impl<'a> SourceContext<'a> {
+    pub fn new(file: &'a FileDescriptorProto) -> Self {
+        let mut map = std::collections::HashMap::new();
+        for loc in &file.source_code_info.location {
+            map.insert(loc.path.clone(), loc);
+        }
+        Self { location_map: map }
+    }
+
+    pub fn get_message_loc(&self, msg_index: usize) -> Option<&Location> {
+        self.location_map.get(&vec![4, msg_index as i32]).copied()
+    }
+
+    #[expect(unused)]
+    pub fn get_nested_loc(&self, parent_path: &[i32], nested_index: usize) -> Option<&Location> {
+        let mut path = parent_path.to_vec();
+        path.push(3);
+        path.push(nested_index as i32);
+        self.location_map.get(&path).copied()
+    }
+}