Revise WinGet and Scoop installation guide (#431)

* Revise WinGet installation guide

* `six` is not required by LLDB any more

* Revise Scoop installation guide

Author: stevapple

install/windows/_scoop.md

@@ -13,18 +13,12 @@ Invoke-RestMethod get.scoop.sh | Invoke-Expression
 
    ~~~ batch
    scoop bucket add versions
-   scoop install python310
-   ~~~
-
-   Start up a new command-line shell (eg. Command Prompt, Windows PowerShell) and install the Python library `six`.
-
-   ~~~ batch
-   pip install six
+   scoop install python39
    ~~~
 
 0. Install platform dependencies:
 
-   The platform dependencies cannot be installed through Scoop as the install rules cannot install all required components. They will be installed through the Visual Studio installer.
+   The platform dependencies cannot be installed through Scoop as the install rules cannot install all required components. They will be installed through the Visual Studio 2022 Community installer. You may change the Visual Studio edition depending on your usage and team size.
 
    <div class="warning" markdown="1">
    This code snippet must be run in a traditional Command Prompt (`cmd.exe`).

install/windows/_winget.md

@@ -2,21 +2,17 @@
 
 [Windows Package Manager](https://docs.microsoft.com/windows/package-manager/) (aka WinGet) comes pre-installed with Windows 11 (21H2 and later). It can also be found in the [Microsoft Store](https://www.microsoft.com/p/app-installer/9nblggh4nns1) or be [installed directly](ms-appinstaller:?source=https://aka.ms/getwinget).
 
-0. Install required dependencies:
+0. Install required Visual Studio components:
+
+   Install the latest MSVC toolset and Windows 11 SDK (10.0.22000) through Visual Studio 2022 Community installer. You may change the Visual Studio edition depending on your usage and team size.
 
    ~~~ batch
-   winget install --id Git.Git -e
-   winget install --id Python.Python.3.9 -e
    winget install --id Microsoft.VisualStudio.2022.Community --exact --force --custom "--add Microsoft.VisualStudio.Component.Windows11SDK.22000 --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"
    ~~~
 
-   Start up a new command-line shell (eg. Command Prompt, Windows PowerShell) and install the Python library `six`.
-
-   ~~~ batch
-   pip install six
-   ~~~
+0. Install Swift and other dependencies:
 
-0. Install Swift:
+   Install the latest Swift developer package, as well as compatible Git and Python tools if they don't exist.
 
    ~~~ batch
    winget install --id Swift.Toolchain -e