docs(guide): add detailed page for behavior settings

[Priveetee]

No description provided.

[Copilot]

Pull Request Overview

This PR adds comprehensive documentation for behavior settings in both English and French, explaining how users can configure the application's behavior for video playback, navigation, and interaction patterns.

• Adds detailed documentation pages for behavior settings with descriptions, options, and defaults for each setting
• Includes personal preference tips to help users understand practical use cases
• Updates navigation configuration to include the new documentation pages in both language versions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
docs/user-guide/settings-behavior.md	New comprehensive English documentation for behavior settings with detailed explanations and user tips
docs/fr/user-guide/settings-behavior.md	French translation of the behavior settings documentation
docs/.vitepress/fr.mts	Updates French navigation menu and fixes search/footer text
docs/.vitepress/en.mts	Updates English navigation menu and copyright information

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[Copilot]

The copyright holder has been changed from 'Priveetee' to 'Tux' in both language files. This appears to be unrelated to the behavior settings documentation and should be documented in the commit message or handled in a separate PR for clarity.

Suggested change

	copyright: "Copyright © 2025-present Tux",
	copyright: "Copyright © 2025-present Priveetee",

[Copilot]

The copyright holder has been changed from 'Priveetee' to 'Tux'. This change appears unrelated to adding behavior settings documentation and should be documented in the commit message or handled in a separate PR for clarity.

Suggested change

	copyright: "Copyright © 2025-present Tux",
	copyright: "Copyright © 2025-present Priveetee",