chore(zh): replace the CSS examples in translated content

[yin1999]

trafficstars

@bsmth has moved some CSS examples into mdn/content (The PRs could be found here). We should do some reflection here.

Please note that the examples should be localized when copying them.

Related Project: mdn/mdn#597.

### zh-CN
- [ ] #24473
- [ ] #24504
- [ ] #24656
- [ ] #24747
- [ ] #24806
- [ ] #25095
- [ ] #25096
- [ ] #26180

### zh-TW
- [ ] Todo

[bsmth]

Thank you very much for the help. If you need some assistance with reviews or tooling, please reach out. It would be great to minimize the amount of manual work needed, so if you're doing something tedious, let us know as there may be good shortcuts to search & replace the macros with the examples from en-us main.

[Grogogoll]

[spam]