Adding logo to README

[kavyasrinet]

Description

Adding the logo in the README

Fixes # (issue)

Type of change

Please check the options that are relevant.

• Bug fix (non-breaking change that fixes an issue)
• Proposes a change (non-breaking change that isn't necessarily a bug)
• Refactor
• New feature (non-breaking change that adds a new functionality)
• Breaking change (fix or feature that would break some existing functionality downstream)
• This is a unit test
• Documentation only change
• Datasets Release
• Models Release

Type of requested review

• I want a thorough review of the implementation.
• I want a high level review.
• I want a deep design review.

Testing

Rendered the README locally and tested.

Checklist:

• I have performed manual end-to-end testing of the feature in my environment.
• I have added Docstrings and comments to the code.
• I have made changes to existing documentation where needed.
• I have added tests that show that the PR is functional.
• New and existing unit tests pass locally with my changes.
• I have added relevant collaborators to review the PR before merge.

[kavyasrinet]

nit : Github rich diff doesn't render it properly - it should show up right most , next to droidlet when merged.

[anuragprat1k]

Just get rid of the 'droidlet' text entirely so it only says droidlet once?