feat: add docfill mvp cli

examples/sqlite-to-excel/task.json

@@ -0,0 +1,18 @@
+{
+  "vars": {
+    "date": "2026-06-18"
+  },
+  "data": {
+    "type": "sqlite",
+    "path": "./data.db",
+    "query": "select department, report_date, total_count, abnormal_count from department_summary where report_date = ? order by department",
+    "params": ["{{date}}"]
+  },
+  "template": {
+    "path": "./template.xlsx"
+  },
+  "output": {
+    "path": "./out/summary_{{department}}_{{_row}}.xlsx",
+    "overwrite": true
+  }
+}