[feature] Add Mainnet Guidance to Enhance User Interaction in Diploma Section

[TwilightLogic]

Background: No guidance in "Mainnet" portion

The Diploma section has a guidance feature for the "Test Net" portion which has proven to be beneficial for user interaction and understanding. However, the "Main Net" portion lacks such guidance, which may be impeding user engagement and comprehension.

• Screenshot:
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Target

Implement a similar guidance feature in the "Main Net" section of the Diploma chapter to enhance user interaction and understanding, drawing from the success of the guidance feature in the "Test Net" section.