Inital draft proposal for api explorer

[pratapsingh9]

PR Description

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Related Issues

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Checklist

• I have gone through the contributing guide
• I have updated my branch and synced it with project main branch before making this PR
• I am using the latest Flutter stable branch (run flutter upgrade and verify)
• I have run the tests (flutter test) and all tests are passing

Added/updated tests?

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• No, and this is why: please replace this line with details on why tests have not been included

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[pratapsingh9]

@animator @ashitaprasad Could you please provide feedback on my proposal so I can know what changes I need to make?

[animator]

The proposal looks good. You can go ahead and submit it in the website.
Post which send across a PR for the UI you have provided in the proposal.