[Open] Add a tutorial on publishing and verifying your smart contract

[gupadhyaya]

Where to add? https://github.com/harmony-one/docs-home/blob/master/developers/tutorials/publishing-and-verifying-your-smart-contract.md

Objectives:

• Add a section for publishing and verifying using explorer frontend. e.g., example
• Using verification cli to do the same.

There is some guide already in https://docs.harmony.one/home/developers/tools/smart-contract-verification, but does not cover the cli

Reward

• 500 ONE