Add/update "GitHub Community Health files" for the org #8

Feature details?

GitHub Community Health files helps creating default resources for all repositories maintained under the developersIndia GitHub Organization.

Some of such files have already been created & implemented in #2, #5, #4 & the following ones are remaining:

• Issue & PR templates
• CONTRIBUTING.md
• SECURITY.md
• SUPPORT.md
• FUNDING.yml

Code of Conduct

• I agree to follow this project's Code of Conduct