[Feature request] Option to toggle font ligatures

[isf63]

Is your feature request related to a problem? Please describe.
Currently font ligatures are always enabled in QTerminal. Users may want to disable ligatures for a given font.

Describe the solution you'd like
A checkbox to enable/disable font ligatures

Describe eventual alternatives you've considered

Context

Font ligatures are a feature of certain fonts that combine several characters into one automatically. They are currently supported by QTerminal and seemingly always enabled.

Qt 6.7 introduced QFont::setFeature for fonts. I believe QFont::setFeature("liga", 0 || 1); can be used to toggle this feature.

System Information

• Distribution & Version: Arch Linux
• Qt Version: qt6-base 6.8.2-3, qt5-base 5.15.16+kde+r130-4
• liblxqt Version: git
• Package version: git