chore(project): 初始化项目结构和配置

- 添加 .idea 目录和相关配置文件，设置项目忽略文件、编码、模块管理等
- 创建商务大数据分析目录和子目录，准备数据和任务笔记本
- 添加示例数据文件：中国城市人口数据.csv
- 创建任务笔记本文件，进行数据处理和分析示例

商务大数据分析/20250402/data/中国城市人口数据.csv

@@ -0,0 +1,23 @@
+ʡ<EFBFBD><EFBFBD>,2020<EFBFBD><EFBFBD><EFBFBD>˿ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD>,2019<EFBFBD><EFBFBD><EFBFBD>˿ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD>
+<EFBFBD>ӱ<EFBFBD>ʡ,7461,7447
+ɽ<EFBFBD><EFBFBD>ʡ,3492,3497
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,4259,4277
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,2407,2448
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,8475,8469
+<EFBFBD>㽭ʡ,6457,6375
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,6103,6092
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,4154,4137
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,4519,4516
+ɽ<EFBFBD><EFBFBD>ʡ,10153,10106
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,9937,9901
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,5775,5927
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,6644,6640
+<EFBFBD>㶫ʡ,12601,12489
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,1008,995
+<EFBFBD>Ĵ<EFBFBD>ʡ,8367,8351
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,3856,3848
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,4721,4714
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,3953,3944
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,2502,2509
+<EFBFBD>ຣʡ,592,590
+<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ,3185,3255