Redesign documentation site

[freakdaniel]

Summary

Redesign the documentation site to match the Hyprism Team visual style

Type of Change

• Enhancement / improvement
• Documentation update

Changes

• Replaced Hyprism Team branding with Hyprism Launcher branding and launcher logo
• Redesigned the documentation site with the team website visual style
• Removed decorative monospace labels and limited JetBrains Mono to code blocks
• Improved desktop sidebar active-state styling
• Removed the empty table-of-contents column from the overview page
• Reworked compact navigation into a full-screen dropdown below the existing navbar
• Removed the duplicate mobile header and the “Back to main menu” button
• Restored documentation search in the compact menu
• Added outside-click, Escape, and navigation dismissal behavior
• Centered the GitHub edit-page link and added the GitHub icon
• Updated English and Russian documentation-site maintenance notes

Checklist

• Code follows the project's style and conventions
• Self-reviewed the diff before submitting
• No unintended files are included
• Documentation updated if needed