refactor(experiment_5):重构实验 5 数据格式和图表展示

- 移除 iris.csv 和 marketing.sql 文件
- 新增 sales_manager.csv 和 sales_month.csv 文件
- 添加 sales_manager.js 文件，实现销售数据的图表展示

experiment_5/task4/data/sales_province.csv

@@ -0,0 +1,31 @@
+province,sales,profit
+安徽,113742.734,32222.834
+北京,76154.54,19854.24
+福建,102315.08,32774.7
+甘肃,47267.444,-13210.036
+广东,254769.725,58887.605
+广西,48349.532,14036.932
+贵州,15893.136,287.616
+海南,10995.88,4132.94
+河北,227145.8,43675.38
+河南,79220.54,17722.6
+黑龙江,273877.632,66982.132
+湖北,135006.9,-33492.34
+湖南,163503.277,31399.277
+吉林,76539.617,17712.317
+江苏,128183.776,-16801.764
+江西,29987.86,7944.72
+辽宁,152250.028,-29393.812
+内蒙古,59787.252,-15047.368
+宁夏,12685.988,-900.592
+山东,192400.46,49812.56
+山西,99782.9,25386.9
+陕西,102767.168,21152.628
+上海,99893.584,17668.784
+四川,60567.584,-9514.876
+天津,95426.03,20107.01
+西藏,1144.92,400.26
+新疆,16700.88,4683
+云南,79432.052,16937.032
+浙江,94619.56,-27441.26
+重庆,65262.4,11809.84