[feat]更新README, 增加td银行相关的说明

[ramsayleung]

Description

1. 更新README, 增加 td银行 provider相关的说明
2. 修复工商银行示例中, config 与 账单路径不正确的问题

Motivation and Context

https://github.com/deb-sig/double-entry-generator/issues/101

Dependencies

None

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How has this been tested?

1. Review the difference before creating a pull request
2. All CI jobs pass

Is this change properly documented?

Yes.

Please make sure you've properly documented the changes you're making.

Don't forget to add an entry to the CHANGELOG/README if necessary (new features, breaking changes, relevant internal improvements).