Update Adding new Account Values

[czhang771]

Updating Adding new Account Values Page

:recycle: Current situation & Problem

Prior, there were no code examples for creating a custom DataDisplayView for non-String based values.

:gear: Release Notes

• Highlighted example of creating custom DataDisplayView using an Int-based Value.

:books: Documentation

• added sentence highlighting the difference between the default String-based DataDisplayView and a custom DataDisplayView of different value type
• wrote one-sentence description of the example of a HeightValue Key
• inserted code example

:white_check_mark: Testing

:pencil: Code of Conduct & Contributing Guidelines

By submitting creating this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• [x] I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 76.33%. Comparing base (a7d289e) to head (1bf5e77).

Additional details and impacted files

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