Shellcode execution is broken

[vdudouyt]

*Describe the bug
I have installed Qiling with latest dev branch just as recommended in your tutorial.
When I run your shellcode emulation example, it results in KeyError: 'x8664'.
Emulating binaries is working without any problems for me.

Sample Code

from qiling import Qiling
from qiling.const import QL_VERBOSE

# set up a shellcode to emulate
shellcode = bytes.fromhex('''
   fc4881e4f0ffffffe8d0000000415141505251564831d265488b52603e488b52
   183e488b52203e488b72503e480fb74a4a4d31c94831c0ac3c617c022c2041c1
   c90d4101c1e2ed5241513e488b52203e8b423c4801d03e8b80880000004885c0
   746f4801d0503e8b48183e448b40204901d0e35c48ffc93e418b34884801d64d
   31c94831c0ac41c1c90d4101c138e075f13e4c034c24084539d175d6583e448b
   40244901d0663e418b0c483e448b401c4901d03e418b04884801d0415841585e
   595a41584159415a4883ec204152ffe05841595a3e488b12e949ffffff5d49c7
   c1000000003e488d95fe0000003e4c8d850f0100004831c941ba45835607ffd5
   4831c941baf0b5a256ffd548656c6c6f2c2066726f6d204d534621004d657373
   616765426f7800
''')

# instantiate a Qiling object to emulate the shellcode. when emulating a binary Qiling would be able to automatically
# infer the target architecture and operating system. this, however, is not possible when emulating a shellcode, therefore
# both 'archtype' and 'ostype' arguments must be provided
ql = Qiling(code=shellcode, rootfs=r'examples/rootfs/x8664_windows', archtype='x8664', ostype='Windows', verbose=QL_VERBOSE.DEBUG)

# do the magic!
ql.run()

Screenshots

$ python ql_shellcode.py 
Traceback (most recent call last):
  File "/root/qiling/ql_shellcode.py", line 21, in <module>
    ql = Qiling(code=shellcode, rootfs=r'examples/rootfs/x8664_windows', archtype='x8664', ostype='Windows', verbose=QL_VERBOSE.DEBUG)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/qiling/qiling/core.py", line 154, in __init__
    self._arch = select_arch(archtype, cputype, endian, thumb)(self)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/qiling/qiling/utils.py", line 388, in select_arch
    module = {
             ^
KeyError: 'x8664'