[SWOC'24] Contributing Guidelines README file

[Avdhesh-Varshney]

Is your feature request related to a problem? Please describe.

• I would like to create a contributing guidelines readme file which contains all the guildelines of contributing in this github repository.

Describe the solution you'd like

• By creating Contributing Guidelines Readme file, this will be very helpful to the newbie in the open-source world.

[Avdhesh-Varshney]

@subh05sus please assign this task to me to contribute under SWOC'24.

[subh05sus]

Assigned !!