refactor: Hyprsunset

hyprsunset.sh -h                                                                                                                          14:43
Usage: hyprsunset.sh [OPTIONS]

Options:
    --cm MODE                   Color mode: 'temp' for temperature, 'gamma' for gamma
    -i, --increase [STEP]       Increase the selected color mode value
    -d, --decrease [STEP]       Decrease the selected color mode value
    -s, --set VALUE             Set specific value for the selected color mode
    -r, --read                  Read current screen temperature and gamma
    -t, --toggle                Toggle hyprsunset (on/off)
    -q, --quiet                 Disable notifications
    -P, --sigproc PROC,SIGNAL   Send signal to process (e.g., --sigproc waybar,19)
    -h, --help                  Show this help message

Examples:
    hyprsunset.sh -r                     # Read current values
    hyprsunset.sh --cm temp -i           # Increase temperature by 500K
    hyprsunset.sh --cm temp -d 1000      # Decrease temperature by 1000K
    hyprsunset.sh --cm temp -s 4000      # Set temperature to 4000K
    hyprsunset.sh --cm gamma -i          # Increase gamma by 5
    hyprsunset.sh --cm gamma -d 10       # Decrease gamma by 10
    hyprsunset.sh --cm gamma -s 80       # Set gamma to 80
    hyprsunset.sh -t --quiet             # Toggle mode quietly
    hyprsunset.sh --sigproc waybar,19    # Send SIGUSR1 to waybar

Author: kRHYME7