docs(CONTRIBUTING): update contributing guidelines based on Tokio

[SanchithHegde]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation

Description

Updates CONTRIBUTING.md based on Tokio's contributing guidelines

Additional Changes

• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

I felt that the current contributing guidelines could have been improved.

How did you test it?

This change does not warrant testing.

Checklist

• I formatted the code cargo +nightly fmt
• I addressed lints thrown by cargo clippy
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable

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The following pieces of information are yet to be added:

• Information about tests
• Versioning policy, if any
• Release process
• Links to Slack/Discord

I'll create a separate issue for the same.

[ashokkjag]

Looks good. Just make sure that the text isn't duplicated somewhere else, especially things like commit message guidelines.

[SanchithHegde]

Just make sure that the text isn't duplicated somewhere else, especially things like commit message guidelines.

As of now, commit message guidelines are only up on Confluence, so the only public place containing the guidelines is this repository.