chore: reorganize project into monorepo

backend/src/models/categories.rs

@@ -0,0 +1,23 @@
+pub use super::_entities::categories::{ActiveModel, Entity, Model};
+use sea_orm::entity::prelude::*;
+pub type Categories = Entity;
+
+#[async_trait::async_trait]
+impl ActiveModelBehavior for ActiveModel {
+    async fn before_save<C>(self, _db: &C, insert: bool) -> std::result::Result<Self, DbErr>
+    where
+        C: ConnectionTrait,
+    {
+        if !insert && self.updated_at.is_unchanged() {
+            let mut this = self;
+            this.updated_at = sea_orm::ActiveValue::Set(chrono::Utc::now().into());
+            Ok(this)
+        } else {
+            Ok(self)
+        }
+    }
+}
+
+impl Model {}
+impl ActiveModel {}
+impl Entity {}