docs(repo): updated documentation to include yarn instructions

Author: sridharmallela

docs/commitlint-config.md

@@ -34,7 +34,11 @@ This package is a [`commitlint`](https://github.com/conventional-changelog/commi
 ## Installation
 
 ```bash
-$ npm i --save-dev commitlint-config-smallela
+  $ npm i --save-dev commitlint-config-smallela
+```
+
+```bash
+  $ yarn add --dev commitlint-config-smallela
 ```
 
 ## Usage

docs/npm-commands.md

@@ -25,6 +25,10 @@ permalink: '/npm-commands'
   $ npm i --save-dev npm-commands-smallela
 ```
 
+```bash
+  $ yarn add --dev npm-commands-smallela
+```
+
 ## Usage
 
 ```ts

docs/nx-commands.md

@@ -10,15 +10,15 @@ permalink: '/nx-commands'
 
 This module exports all the commands that Nx supports programmatically.
 
+## Table of Contents
+
 <!-- TOC -->
 
 - [Table of Contents](#table-of-contents)
 - [Installation](#installation)
 - [Usage](#usage)
 - [License](#license)
 
-<!-- /TOC -->license)
-
 <!-- /TOC -->
 
 ## Installation
@@ -27,6 +27,10 @@ This module exports all the commands that Nx supports programmatically.
   $ npm i --save-dev nx-commands-smallela
 ```
 
+```bash
+  $ yarn add --dev nx-commands-smallela
+```
+
 ## Usage
 
 ```ts

docs/print-cli.md

@@ -32,6 +32,10 @@ Generate a printable representation of ASCII text. Thanks to [Figlet](https://ww
   $ npm i --save-dev print-cli
 ```
 
+```bash
+  $ yarn add --dev print-cli
+```
+
 ## Usage
 
 ```bash

docs/versions-checker.md

@@ -34,6 +34,10 @@ Check installed versions of node, npm, yarn, and git
   $ npm i --save-dev versions-checker
 ```
 
+```bash
+  $ yarn add --dev versions-checker
+```
+
 ## Usage
 
 ```bash