Demo for syzkaller snippets highlighting

See 🌈 Highlighting syzkaller descriptions syntax with Rouge for details.

Use syzlang to highlight descriptions:

``` syzlang
socket$inet_tcp(domain const[AF_INET], type const[SOCK_STREAM],
                proto const[0]) sock_tcp
bind$inet(fd sock_in, addr ptr[in, sockaddr_in], addrlen len[addr])
listen(fd sock, backlog int32)
```

Rendered as:

socket$inet_tcp(domain const[AF_INET], type const[SOCK_STREAM],
                proto const[0]) sock_tcp
bind$inet(fd sock_in, addr ptr[in, sockaddr_in], addrlen len[addr])
listen(fd sock, backlog int32)

Use syzprog to highlight programs:

``` syzprog
r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, &(0x7f0000001000)={0x2, 0x0, @empty=0x0}, 0x10)
listen(r0, 0x5)
```

Rendered as:

r0 = socket$inet_tcp(0x2, 0x1, 0x0)
bind$inet(r0, &(0x7f0000001000)={0x2, 0x0, @empty=0x0}, 0x10)
listen(r0, 0x5)