Add good beginners-friendly repositories

[garg3133]

Add some good repositories beginners can easily contribute to in repositories.json file in the following format:

{
    "name": "repo-name",
    "link": "repo-link",
    "description": "a short description about project",
    "labels": ["issue-label1", "issue-label2"]
},

Put this json object anywhere in between the other repositories listed in the file but please do not add it at the start or end of the list.

Upon merging of your pull request, Readme.md will be automatically updated listing the beginners-friendly repository added by you.