gh-pr-create: add Chinese translation

[huangjp63]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[CLAassistant]

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[tldr-bot]

The build for this PR failed with the following error(s):

pages/common/gh-pr-create.md:49:20 MD047/single-trailing-newline Files should end with a single newline character
pages/common/gh-pr-create.md:
Error: Parse error on line 28:
...支比较，并在编辑器中填写PR信息：  gh pr create- 创建PR
----------------------^
Expecting 'NEWLINE', 'BACKTICK', got 'TEXT'
pages/common/gh-pr-create.md:13: TLDR011 Page never contains more than a single empty line
pages/common/gh-pr-create.md:27: TLDR015 Example descriptions should start with a capital letter
pages/common/gh-pr-create.md:27: TLDR005 Example descriptions should end in a colon with no trailing characters
pages/common/gh-pr-create.md:27: TLDR014 Page should contain no trailing whitespace

Please fix the error(s) and push again.

[acuteenvy]

The pages directory contains pages in English. Translations have their own pages.language_code directories, so please move these examples into the correct location and put the English version here.