docs: add voice and tone style guide

[TRohit20]

Description

• The Pull request introduces a document about voice and tone to be used in writing style, as part of out style guide.

Related issue(s) Reolves #1249

[TRohit20]

@alequetzalli Migrated the pull request and made some edits based on my knowledge, please review from your side and merge if all looks good, thank you!

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity :sleeping:

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[AnimeshKumar923]

@TRohit20 status?