opencode: update page and add more commands

[WhiteHades]

If you are a new contributor to the project, do not use AI to generate pages. We will close any PR with a suspicion of AI usage.

• 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 title conforms to the recommended templates.
• Version of the command being documented (if known):
  0.15.8

[Managor]

Looks good after this

[WhiteHades]

@Managor i think you can merge this now, considering all checks are passed.

[Managor]

Eventually. No rush. Due to hacktoberfest we are taking extra time before merging.