Craft documentation for the library

[salikansari6]

The library currently has two components Preloader and PreloadMessage.
Add code snippets in markdown and instruct the user how to use the components in their project by adding examples and information about the library

After you clone the repo, Run

npm install

to install all the dependencies required for the project
After that, Run

npm run storybook

to view the components present in the library and experiment with them by changing props