增加运行参数use-lower-case 使用小写字母

[stevqin]

--use-lower-case true 让生成的Doris表名与字段名使用小写

Proposed changes

Issue Number: close #xxx

Problem Summary:

Describe the overview of changes.

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)

Further comments

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[DongLiang-0]

Thanks for your contribution. In doris you can set the lower_case_table_names variable to ignore case, so providing this functionality in a sync tool is a bit redundant.

[stevqin]

Thanks for your contribution. In doris you can set the lower_case_table_names variable to ignore case, so providing this functionality in a sync tool is a bit redundant.

这个可能和 Doris中的 lower_case_table_names 变量不一样, 在 Doris中, 根据官方文档解释, 这个变量仅对Oralce数据库生效, 并且一旦对Oracle数据库生效后, 则会出现无法查询 Oralce中 小写字母的表.

[DongLiang-0]

Is it possible to default to lowercase when writing, and then turn on this switch when uppercase is needed?

[DongLiang-0]

Since the community is global and there are many foreign developers, thank you for changing all descriptions to English.