Unhandled exception: ModuleNotFoundError: No module named 'msgpack'

### Step 1: Please describe your environment

* ZeroNet version: latest
* Operating system: windows 10 pro
* Web browser: chrome
* Tor status: always
* Opened port: yes
* Special configuration: ____

### Step 2: Describe the problem:
im trying to make a website but its just crashing after im saying yes
#### Steps to reproduce:

1.python .\zeronet.py siteCreate
2.say yes
3. crash

#### Observed Results:

```
Traceback (most recent call last):
File ".\zeronet.py", line 17, in main
main.start()
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\main.py", line 537, in start
actions.call(config.action, action_kwargs)
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\main.py", line 121, in call
back = func(**kwargs)
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\main.py", line 164, in siteCreate
from Site.Site import Site
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\Site\Site.py", line 26, in
from File import FileServer
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\File\__init__.py", line 1, in
from .FileServer import FileServer
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\File\FileServer.py", line 13, in
from .FileRequest import FileRequest
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\File\FileRequest.py", line 14, in
from util import Msgpack
File "D:\Downloads\ZeroNet-win-dist-win64\core\src\util\Msgpack.py", line 5, in
import msgpack
ModuleNotFoundError: No module named 'msgpack'
```

#### Expected Results:

enable my site or something like that

zeronet.py の siteCreate パスと util/Msgpack.py から始め、プロジェクトの依存関係またはインストール設定を調べて、Windows で msgpack を利用できない理由を特定します。`python .\zeronet.py siteCreate` を再現し、コマンドが ModuleNotFoundError で停止しなくなったことを確認します。

索引モデルが issue の本文から書いたものです。