distro-files: small rework

add files to /etc/skel and /home/astral, move DOOM1.WAD and id1 to /usr/share/games folders and create symlinks to them in the recipe

distro-files/home/astral/hello.asm

@@ -0,0 +1,13 @@
+section .text
+global _start
+_start: 
+	mov rax, 7
+	mov rdi, 1
+	mov rsi, msg
+	mov rdx, 14
+	syscall
+	mov rax, 13
+	xor rdi, rdi
+	syscall
+section .data
+msg: db "Hello, world!", 0xA