[Feature Request]: Implement function 'precheck'

[aronchanisme]

Is there an existing issue for the feature request?

• [X] I have checked the existing issues.

Feature Description

Usage : mo_ctl precheck # check pre-requisites for mo_ctl Check list : go gcc git mysql

Check before deploying mo, for below aspects,

1. if it is installed
2. if version meets required

returns 0 if all ok, otherwise returns 1

Feature Implementation

1. use which to detect if cmd is installed
2. write a basic fuction to compare two given versions and if v1 ≥ v2

Additional information

none

[aronchanisme]

feature implemented