[ZH] Add `Cropping with backgrounds`

[CloneWith]

Self-check

• [x] The changes are tested against the contribution checklist
• [x] (translations only) The changes are reviewed on GitHub by a fluent speaker

Changed files

• A /wiki/Guides/Cropping_with_simple_backgrounds/zh.md
  • Res img/CSB-2-ZH.png
  • Res img/CSB-3-ZH.png
  • Res img/CSB-4-ZH.png
  • Res img/CSB-5-ZH.png
• A /wiki/Guides/Cropping_with_complex_backgrounds/zh.md