Add installation tutorials for various versions of ComfyUI and a tutorial for generating image for the first time.

[comfyui-wiki]

New content

The following content adjustments include both Chinese and English versions.
Click the corresponding link to access the version I deployed myself.

• Installation instructions for:
  • Windows
  • MacOS
  • Windows portable versions
• The first guidance for image generation.
  • Adjust the original reference to third-party video tutorials to a complete first-time image generation guide.
• New introduction content has been added to the introduction page
• Add README.zh-CN.md

tutorials

• text to image
• image to image
• inpaint
• outpaint
• Upscale

Content Change

• Adjust mint.json to doc.json according to the documentation of mintlify.
• Fix some broken links in the original document.
• Some files have been renamed, such as gettingstarted
• The original README.md configuration used mint.json. Currently, it has been changed to docs.json according to the mintify documentation. So, I have updated the relevant instructions in README.md.
• Fix logo display error

Online preview：https://comfyui-wiki-4f3e7282.mintlify.app/