New Type of Set: "Duration with Load"

[hmwazir]

Prerequisites

• I have searched the Existing Discussions and this is not a duplicate.
• I have searched the Existing Issues and this is not a duplicate.
• I have read the Contributing Guidelines.

Is your feature request related to a problem?

Some exercises can be done on with time and extra load e.g., Weighted Planks. Related to issue #67.

Describe the solution you would like

Title

Describe alternatives you've considered

Writing the load in the notes area

Mockups / Screenshots

No response