Logo (Builtin): add Serpent OS

Ref: https://github.com/serpent-os/recipes/blob/main/f/fastfetch/pkg/0001-logo-Port-our-neofetch-Serpent-OS-logo-from-ermo.patch

src/logo/ascii/serpent_os.txt

@@ -0,0 +1,18 @@
+            ,dKNWWNKOxo;.
+          ;xKXOdoloOWMWX0d:.
+        .dNNd'     cNMMMMNKOx;.
+       .dWNo       .:oxO000KXKl.
+       .OMNl             .....
+        oNMXd,.
+        .lKWMNKkdollccc:::;;;,'..
+          .;ox0KNWWMMMMMMMMWWWWNK0xl,.
+               ..,;:ccloodxO0KNWMMMMNOc.
+                             .';lxKWMMWk'
+      ..,:ccc:,.                  .oXMMMO
+   .:d0NWWWWWMWXOo,.     .,cc:;,,'..oWMMW
+ .c0WW0xl:;,;cd0NMNO:'..ldl;.    .'.:XMMM
+ xWMKc.        .;OWMWX0xl.         .dWMMK
+ WMWd.           .oKWMMXx,        .dNMMXc
+ NMMK:.      ..:oxo:oOXMMNOdc:;;cxKWMWO;
+ ;kXWN0xooodkOOko;.   .lONMMMMWWMMWKx;.
+   ,okKXXXKOxc'.        .:kKWMMWXOl'

src/logo/builtin.c

@@ -4052,6 +4052,14 @@ static const FFlogo S[] = {
             FF_COLOR_FG_RED,
         },
     },
+    // Serpent OS
+    {
+        .names = {"Serpent OS"},
+        .lines = FASTFETCH_DATATEXT_LOGO_SERPENT_OS,
+        .colors = {
+            FF_COLOR_FG_WHITE,
+        },
+    },
     // Semc
     {
         .names = {"semc"},