"Find-Command" & "Install-Module" cmdlets should identify OS compatibility

从 Find-Command 和 Install-Module 入口点开始，并在 Ubuntu 16.04 上复现该问题。检查可用模块结果和安装依赖项是如何选择的；完成标准是 Linux 用户不会被提供需要 Windows 专属依赖项的模块，同时兼容的模块仍然可用。

From @MaximoTrinidad on September 28, 2016 13:29

Steps to reproduce

In Linux, using either Find-Command or Install-Module, will list all available (Windows and Linux).

Expected behavior

Install the module that can be executed Linux, as well as Windows.

It maybe a good idea to have these cmdlets check for the OS type before providing the list.

Actual behavior

A Module won't install because it need dependencies, or was built for Windows OS. Below, example has been addressed;
https://github.com/janegilring/PSVersion/issues/5

Environment data

Linux: Ubuntu 16.04.1 64bit

PS /home/maxt> $PSVersionTable                                                  

Name                           Value                                           
----                           -----                                           
PSVersion                      6.0.0-alpha                                     
PSEdition                      Core                                            
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                         
BuildVersion                   3.0.0.0                                         
GitCommitId                    v6.0.0-alpha.10                                 
CLRVersion                                                                     
WSManStackVersion              3.0                                             
PSRemotingProtocolVersion      2.3                                             
SerializationVersion           1.1.0.1  

Copied from original issue: PowerShell/PowerShell#2374