head: add French translation

[SamyOffer]

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): none (translation of head command)

Changes

• Added French translation for the head command page in pages.fr/common/head.md.
• Based on the existing English page

[CLAassistant]

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