[FEATURE] Package Documentation For Users(Node operators)

[Jeongseup]

Feature Description

Add each documentaion to explain how to work each monitoring package for validators and network.

Reason for Need

As you know, some of node operators don't know well deeply about each cosmos-sdk modules. but they should monitor important factors like uptime(slashing-module).

Already the CVMS is supporting all integrated important metrics on Cosmos Ecosystem.

But this project should be bigger and bigger. That makes users may have a problem to understand specific monitoring package logic easily. I know all operators don't need to understand specific logics.

However, To make our Cosmos Ecosystem more stronger, our validators also can understand and contribute bugs and other factors while monitoring chains with CVMS.

Proposed Solution

We make a directory or README.md file in each packages. or make a docs directory like #23 by @qwertzlbert