Installing Mbed CLI for command line management of Mbed OS on Windows 10

Installing Mbed CLI for command line management of Mbed OS

Mbed CLI allows for creating, publishing, managing code under Git/Mercurial, build and export functions.

Pre-requisite:
- Host: Windows 10 LTSC 2021
- Mbed CLI installer downloaded from https://os.mbed.com/, I am using Mbed_installer_v0.4.10

Without so much ado, install it like below.