gphoto2: add page

[rafsasinski]

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):
  gphoto2 2.5.32
• Reference issue: #

[Managor]

Please don't force push. We would like to retain commit history of the PR.

[rafsasinski]

Thanks for the guidance. No force pushes next time.
I've also added the requested changes.

[rafsasinski]

Cheers, I updated the page based on the comments.