[Hwi0228]

Summary

Add a built-in ASCII logo for ZelixOS.

Related issue (required for new logos for new distros)

Closes #2685

Changes

• src/logo/ascii/z/zelixos.txt - Add the ZelixOS ASCII logo.
• src/logo/ascii/z.inc - Register the built-in ZelixOS logo and its colors.

Screenshots

                IXZELIXZELIXZE               hwi@DESKTOP-51GED05
             ZELIXZELIX       LIXZ           OS: Windows 11 Home (26H2) x86_64
          LIXZELIX        IXZELIXZE          Kernel: WIN32_NT 10.0.26300.9711
        ZELIXZE               LIXZELI
       XZELIX                   XZELIXZ
      IXZEL      XZELIXZELIXZ     ELI
     LIXZE       XZELIXZELIXZ     ELI
    ELIXZ              ZELI       ELIX EL
    ELIXZ            IXZEL        ELIX EL
    ELIX           ELIXZ          ELI  EL
    ELIX         XZELI            ELI ZEL
    ELIX EL      XZELIXZELIXZ   XZEL  ZEL
     LIXZELI                  LIXZ  IXZEL
     LIXZ LIX              XZELIX  LIXZE
      IXZE  XZEL      XZELIX    XZELIX
       XZEL  ZELIXZ           LIXZELI
         ELI    IXZELIXZELIXZELIXZ
          LIXZ     ELIXZELIXZEL
             ZEL

Checklist

• I have tested my changes locally.