Added shield badges in readme

[sivangbagri]

Changes proposed ✍️

What

Updated README.md by adding relevant shield badges ​Solved issue #1656

Checklist ✅

• [x] Label appropriately with Feature, Improvement, or Bug.
• [ ] Add screehshots to the PR description for relevant FE changes
• [ ] New backend functionality has been unit-tested.
• [ ] API documentation has been updated (if necessary) (see docs on API documentation).
• [x] Quality standards are met.

[CLAassistant]

All committers have signed the CLA.

[sivangbagri]

@joanagmaia @jonathimer please merge if review is completed .