Add branding icon for Linux environment

[IanReyes44]

Add branding icon to taskbar and main window for Linux environment. Add icons to Installer too

linux environments to test:

1. deb
2. rpm
3. flatpak

[jamesmarkchan]

https://gemini.google.com/share/03ec0af9532b

[jamesmarkchan]

looks like linux deb might be working now!

@IanReyes44 @jslcom @JasmineRRod

[jamesmarkchan]

flatlaf also has consolidated titlebar support which i'll configure for now