feat: add Dark theme to Gordon XLIFF Editor

[Carlo-Baldi-EOS]

🙋 Feature Request

Since I prefer to work with all my software in darkmode, I would like to avoid getting flashbanged every time i need to do some translations with Gordon xliff editor 😅

🤔 Expected Behavior

when i turn dark mode on, it switches from the ligth theme to the dark theme and viceverse when i turn it off.

💁 Possible Solution

a Toggle in the ribbon

or maybe a flag in settings

whichever is easier to implement :)

💻 Examples

Product

• Gordon (Version: WriteHereTheVersion)
• Gordon VSCode (Version: WriteHereTheVersion)
• Gordon Powershell (Version: WriteHereTheVersion)
• Gordon Service (Version: WriteHereTheVersion)
• Gordon Xliff Editor
• EOS Gordon Installer