qgis: add page

[jeetjawale]

Checklist

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• 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 contains at most 5 new pages.
• The PR is authored by me, or has been human-reviewed if it was created with AI or machine translation software.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known): 3.44.7

[emmanuel-ferdman]

Welcome to the project! A few notes:

• We could point to the CLI URL instead of just the main website
• Please add support to missing short forms (-p, -n, -e, -P, -B, -f)
• Ideally the description should start with imperative verb

[jeetjawale]

Addressed all review suggestions.

[dmmqz]

LGTM after this minor issue