feat: cross platform terminal settings

[hcavarsan]

updated how app handle terminal settings for docker exec. now user can choose from more terminal apps like gnome-terminal, konsole, alacritty, xterm, terminator, xfce4-terminal, cmd.exe, powershell.exe, terminal, iterm, and wezterm.

added a dropdown menu in the settings screen where user can pick preferred terminal app. it saves automatically, so when app run a docker exec command, it'll use the terminal selected.

relates: #12

macos:

Area.mp4

linux (fedora):

linux.mp4

[ropali]

Overall a good & much needed PR. I have added some suggestions for improvement.

[hcavarsan]

thanks, that makes sense. i’m already working on the changes and will push the adjustments soon (probably by tomorrow)

[hcavarsan]

Hey @ropali, I made some changes based on the review comments. Can you check them? I think the code is now better, more flexible, and simpler.

linux:
https://github.com/user-attachments/assets/720d16fb-f92b-4d0c-9716-3f1215bed539

macos:
https://github.com/user-attachments/assets/d3fb9c44-0f40-4010-95b3-a9a5de70d1c4

[ropali]

Hey @ropali, I made some changes based on the review comments. Can you check them? I think the code is now better, more flexible, and simpler.

linux: https://github.com/user-attachments/assets/720d16fb-f92b-4d0c-9716-3f1215bed539

macos: https://github.com/user-attachments/assets/d3fb9c44-0f40-4010-95b3-a9a5de70d1

I took a quick look and changes look good so far. please allow me some time to review it thoroughly.