refactor(all): add test file

data/reports/histogram/histogram.csv

+x,y
+Apples,5
+Apples,10
+Apples,3
+Oranges,10
+Bananas,5
\ No newline at end of file

data/reports/histogram/histogram_flow.csv

+FLOW ID,是否启用,名称,触发条件,触发条件参数,存储模式,
+70129,TRUE,histogram,Manual,,Memory,
+,,,,,,
+FLOW ID,节点ID,名称,节点类型,参数,,
+70129,1,histogram_data,SOURCE_URL,https://shufengdong.github.io/sparrowzz/data/reports/histogram/histogram.csv,,
+,,,,,,
+FLOW ID,首尾节点,动作名称,DESC,动作类型,动作参数,
\ No newline at end of file

data/reports/histogram/histogram_style1.json

+[
+  {
+    "x_series": "x",
+    "y_series": "y",
+    "histfunc": "count",
+    "type": "histogram",
+    "name": "count"
+  },
+  {
+    "x_series": "x",
+    "y_series": "y",
+    "histfunc": "sum",
+    "type": "histogram",
+    "name": "sum"
+  }
+]