feat: Support incremental mode:

- Support incremental mode in heromodels
- Updated the example to refelct the changes
- Updated the tests to reflect the changes

heromodels/src/models/core/comment.rs

@@ -14,7 +14,10 @@ pub struct Comment {
 
 impl Comment {
     /// Create a new comment
-    pub fn new(id: u32) -> Self {
+    ///
+    /// # Arguments
+    /// * `id` - Optional ID for the comment. If None, the ID will be auto-generated.
+    pub fn new(id: Option<u32>) -> Self {
         Self {
             base_data: BaseModelData::new(id),
             user_id: 0,