replace handlebars with jinja

src/generator/modules/discovery/column.rs

@@ -1,14 +1,17 @@
 use color_eyre::{eyre::ContextCompat, Result};
 use heck::ToUpperCamelCase;
 use sea_schema::sea_query::{ColumnDef, ColumnSpec, ColumnType, IndexCreateStatement};
+use serde::{Deserialize, Serialize};
 
 use crate::generator::modules::sea_orm::config::DateTimeCrate;
 
 use super::db::DbType;
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Serialize)]
 pub struct Column {
     pub name: String,
+    #[serde(skip_serializing)]
     pub col_type: ColumnType,
+    #[serde(skip_serializing)]
     pub attrs: Vec<ColumnSpec>,
 }