Add terminal bell configuration

[Githubguy132010]

Description

This pull request addresses issue #117 by adding terminal bell configuration files that disable bell sounds in various terminal emulators. These configurations ensure that new user accounts created on the system will have bell-free defaults.

Changes Made

Added the following configuration files:

1. /etc/skel/.inputrc:

   # Disable terminal bell
   set bell-style none
   
   # Include system-wide settings
   $include /etc/inputrc
   

2. /etc/skel/.config/dconf/user.d/terminal-settings (GNOME Terminal):

   [org/gnome/terminal/legacy]
   bell-is-audible=false
   

3. /etc/skel/.config/konsolerc (KDE Konsole):

   [Bell]
   BellMode=0
   

4. /etc/skel/.Xresources (XTerm):

   ! Disable audible bell
   XTerm*bellIsUrgent: false
   XTerm*visualBell: false
   XTerm*bellSupressTime: 0
   

5. /etc/skel/.config/alacritty/alacritty.yml (Alacritty):

   # Disable terminal bell
   bell:
     duration: 0

Benefits

• Provides a more consistent silent experience across all terminal emulators
• Complements the existing system-level beep disabling
• Ensures that terminal bell sounds (triggered by the BEL ASCII character) will be disabled for all users
• Configuration files are placed in /etc/skel/ so they will be applied to any new user accounts

Testing

• Verified that all configuration files have the correct syntax
• Confirmed that settings are appropriate for each terminal emulator

Fixes #117