Added AnushOS

[AVSISP]

Added AnushOS to src/logo/builtin.c and created src/logo/ascii/anushos.txt

Has been built and tested on an AnushOS system and displays properly:

 #######################    root@anushos
 #        #####        #    ------------
 #       #######       #    OS: AnushOS 1 (Eros) x86_64
 #       ##O#O##       #    Host: AVSISP (1.0)
 #       #######       #    Kernel: Linux 6.12.32
 #     ###########     #    Uptime: 5 hours, 30 mins
 #    #############    #    Packages: 96 (dpkg)
 #   ###############   #    Shell: bash 5.2.37
 #  #######A_O#######  #    Display (QEMU Monitor): 1280x800 @ 75 Hz in 15"
 # ################### #    Terminal: /dev/pts/0
 #######################    CPU: 2 x QEMU Virtual version 2.5+ (8) @ 2.93 GHz
 #######################    GPU: RedHat Device 1050 (VGA compatible)
 #  #################  #    Memory: 189.57 MiB / 7.74 GiB (2%)
 #######################    Swap: 0 B / 4.00 GiB (0%)
 #╔═╗╔╗╔╦ ╦╔═╗╦ ╦╔═╗╔═╗#    Disk (/): 7.78 GiB / 111.65 GiB (7%) - ext4
 #╠═╣║║║║ ║╚═╗╠═╣║ ║╚═╗#    Local IP (ens18): **.***.***.**24
 #╩ ╩╝╚╝╚═╝╚═╝╩ ╩╚═╝╚═╝#    Locale: en_US.UTF-8
 #######################
 #   WWW.ANUSHOS.ORG   #                            
 #######################                            

[AVSISP]

@CarterLi AnushOS is still under development and will be released publicly soon. fastfetch with this config addition is already the packaged version in AnushOS APT repo. Basic idea of what AnushOS is can be read on the website homepage, but the rest of website will be posted when the final release ISO is shipping this coming week.