Update Jeedom logos to new branding

[Salvialf]

Fixes #3348
Closes #3356

Context

This is not my usual responsibility, but given that updated logo assets have been awaited for over 2 years, I took care of it with the means available: no original source files, no dedicated software such as Photoshop.

What changed

Removed files

16 logo files deleted: old size variants, white/black/transparent-background variants, and the old 25x25 favicon. None are currently referenced anywhere in the codebase. If any are needed in the future they can be recreated from the new assets.

Updated logos

• All Jeedom logos (main, Atlas, Freebox, Luna) updated to current branding
• SVG files rewritten: old Inkscape 0.47 (2009) format replaced with clean Adobe Illustrator output, removing all sodipodi/inkscape-specific metadata
• Freebox logos: replaced the previous dedicated artwork with the standard 460x320 logo, resulting in ~85% file size reduction
• Market plugin compatibility logos updated
• Smart logo added in preparation for upcoming system image builds
• jeedom_home_Dark.png and jeedom_home_Light.png replaced by a single logo-jeedom-mobile.png: the new logo requires no color adaptation between themes.

Favicon

The 25x25 favicon was unusable at that resolution. Replaced with a new 64x64 version. default.config.ini and manifest.json.php updated accordingly.

Logo behavior

The new Jeedom logo (without text) renders correctly on both light and dark backgrounds without any color change. Only the text variant requires adaptation. The two mobile config keys (logo_mobile_dark/logo_mobile_light) are kept as separate entries to allow white-label builds to override them independently.

Bug fix

The About page (desktop and mobile) was not displaying the logo when the active theme was light: only the dark variant was being set. Both now correctly handle both themes.

Navbar

Logo height adjusted from 30px to 35 (the px unit was also invalid on an HTML height attribute) to fit the new logo proportions.