Cb-tumblebug: Update the Links and contents of `src/testclient/scripts/README.md`

[ChobobDev]

What would you like to be enhanced
: As you may know, the README.md on the root directory of this project has a translated version, I believe there should be some enhancement of the README.md on src/testclient/scripts .

Why is this needed
:

Proposed solution
: For this occasion, I believe adding another README.md under i18n directory is a bit too much. So I will add extra lines to this file guiding the users to the English README.md respectively.

[ChobobDev]

I will again self-assign myself to this issue.

Thank you

[seokho-son]

@ChobobDev Thank you for the suggestion !!

I think https://github.com/cloud-barista/cb-tumblebug/blob/main/src/testclient/scripts/README.md is not a complete document.
Also, we can make the document simple since the base contents for this document live in the main readme document: CB-Tumblebug 스크립트 사용.

In case of a simple document, maintaining two documents is not an effective way as you mentioned.

How about use English contents only? And provide links to both English and Korean contents.

for instance,

- ## 실행 방법
+ ## How to use 

- [실행 방법](../../../README.md#2-cb-tumblebug-스크립트를-통한-테스트)
+ Using CB-Tumblebug Script [[English](https://github.com/cloud-barista/cb-tumblebug/blob/main/i18n/README-EN.md#using-cb-tumblebug-script),
+ [한국어](https://github.com/cloud-barista/cb-tumblebug#cb-tumblebug-%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EC%82%AC%EC%9A%A9)]

Using CB-Tumblebug Script [[English](https://github.com/cloud-barista/cb-tumblebug/blob/main/i18n/README-EN.md#using-cb-tumblebug-script), [한국어](https://github.com/cloud-barista/cb-tumblebug#cb-tumblebug-%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EC%82%AC%EC%9A%A9)]

[seokho-son]

By the way, it is just my opinion :)
We always need to share idea and discuss for a better way ! So, feel free to show your opinion ~ !

[ChobobDev]

I think It would be more user-friendly if we figure this issue out in this way.

By contributing to this project, I felt making this project more internationalized will attract more contributors to join our project.

I will follow your opinion on this issue and very much appreciate your opinion on this issue.

Thank you

[seokho-son]

@ChobobDev Sure ! it is very important contribution for internationalization of this project !! Thanks!

[ChobobDev]

I really should check the base when I am making the branch so I do not make these mistakes again.

Thank you

[ChobobDev]

@seokho-son As this issue is merged, I will close this issue so The issue lists are nice and tidy.

Thank you