[Auth] Optimize and improve icons

[shmshd]

Overall custom_icons directory size improvement is from 1.3M -> 704K

Replaced image data icons:

• 3commas
• Addy_io
• Bitskins
• Bitvavo
• Configcat
• Controld
• Kpn
• Marketplacedottf
• Odido
• Peerberry
• Porkbun
• Skinport
• Tweakers
• Wise

Optimized icons:

• Bitwarden
• Bloom_host
• Booking
• Brave_creators
• Cloudamqp
• Cloudflare
• Epic_games
• Google
• HuggingFace
• Kraken
• Mintos
• Mistral
• MyFritz
• Notion
• Nucommunity
• Nvidia
• Rockstar_games
• Samsung
• Sms_pool_net
• Synology_dsm
• Teleport
• Twitch
• Ubisoft
• Uphold
• Whmcs
• Windscribe
• Ynab

Improved icons:

• LocalWP
• Mercado_livre
• Transip
• Twingate
• Ubuntu_one
• Wyze
• Yandex

Fixed icons:

• Workos
• Poloniex
• Proxmox
• Registro_br

[tanguylegazon]

Hey there @shmshd! You've done a great job cleaning all this up!

I noticed your recent change to the Proxmox icon, and I think there might be a small issue. The original icon used mix-blend-mode:difference to adjust its visibility depending on whether light or dark mode was active, which helped with accessibility. With you commit, the icon is now black all the time, making it hard to see in dark mode.

Here is an example with the previous version:

VS 0aaf5c6:

[shmshd]

@Eseltwift I missed mix-blend-mode. Could you check others as well as create a PR to fix these?
Thanks