Add Description in Generated Sample Excel File #786

Is your feature request related to a problem? Please describe.
Developers can provide description for column while creating or modifying column. They can click on edit to open column modal or they can click validations (while adding column) to add description in column. The description get's shown in review step,

But users add data in excel, so showing description there become necessary.

We need to show this kind of card when user hover over star or red point,

We can see it live in this sample file,
temperature-small_export.xlsx

We're using xlsx-populate to generate Excel file and sheetjs to parse an Excel file.

Describe the solution you'd like

• When developer provides description, the description should be shown as card in excel.
• The generated excel should be compatible with Microsoft Office, Libre office calc and MacOS Numbers. (I can help with testing)

Additional Context

• Whenever schema is updated following function get's called in backend to generate excel file,

https://github.com/implerhq/impler.io/blob/next/apps/api/src/app/shared/services/file/file.service.ts#L72