Add chinese version of readme

[Opdoop]

Thanks for releasing the powerful TextAttack🎉
For chinese fellows easier to get started with TextAttack, I translate the reademe to chinese. I try my best to adheres to 信、达、雅, the translation principles. But only the content is guaranteed to be informative. This chinese version may need some major review. Despite all this, it's still a good startpoint.
Look forward to receiving your reply~

[qiyanjun]

@MintForever please help review this!

[Opdoop]

@qiyanjun Thanks for the reply~
And @MintForever, waiting for your constructive comment~

[qiyanjun]

@Opdoop can you help me also remove those HTML inline styles from the recipe table in the main Readme.md?

BTW: please rebase! I did some other changes after your PR! https://textattack.readthedocs.io/en/latest/1start/support.html#start-contributing-pull-requests

[Opdoop]

Sorry, I'm a newbie at git. I'm not sure how to rebase after a PR. 😅
@qiyanjun I'll try it tomorrow.🧐

[Opdoop]

@qiyanjun Aloha~ I think I did it.
And remove all in-line style and class="{odd}{even}" didn't change the appearance of the tables.

[Opdoop]

@MintForever Hi, I noticed the review_readme_zh branch, and thanks for your revision! ❤
Only a minor suggestion, the dash '——' in the HTML table title is used to fix the width of the column. Because the github preferred markdown wrap html table column by the max number of word of that column. Without this —— some columns in the table were wrapped in an ugly way. Wish you figure out an elegant way. Or it's better to keep this dash.

[Opdoop]

🧐Question: Where should the entry of chinese version readme be placed?

[qiyanjun]

@Opdoop have you solved @MintForever 's concern?

@Opdoop I will add a link in the main READMe.md

[Opdoop]

@qiyanjun Hi, I did get it. @MintForever his review commits are on branch review_readme_zh, do you want me to merge his change in this PR?

[qiyanjun]

@Opdoop please merge @MintForever (her) change into the PR

[Opdoop]

@qiyanjun Aha~ Done~ Merged @MintForever (her) change into the PR 😃

[qiyanjun]

@Opdoop thanks. Last request of change: I have revised the ordering under the "Design" section. Can you revise your Chinese version accordingly? Many thanks,

[Opdoop]

@qiyanjun Changed the order under the design section and added the Benchmarking section.
I see you're trying to separate dataset and model into two sections. That's great! But HuggingFace support and Loading a model or dataset from a file are still in a coupling.

[Opdoop]

I only modified README_ZH.md. I have no idea why the Test with PyTest failed.🤦‍♂️

[Opdoop]

The PyTest failing checks at install dependencies and the log is below:

pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(104, 'Connection reset by peer')", ConnectionResetError(104, 'Connection reset by peer'))
Error: Process completed with exit code 2.

Still have no idea why this happened.

[qiyanjun]

@Opdoop Thanks.

[Opdoop]

@qiyanjun Thank you for your valuable comments and suggestions.