Add tooltips with docstrings

[jakeleventhal]

Bug description

Right now there is no way to visualize column docstrings. It would be helpful if each column header had a tooltip to show the docstrings for the column if any exist.

How to reproduce

Create a table with docstrings for each column then run prisma studio.

Expected behavior

No response

Prisma information

Any schema works.

Environment & setup

• Link to Data Browser instance: N/A
• OS: Mac OS
• Browser: Safari
• Database: PostgreSQL

Screenshot of page where the problem happened (if applicable)

No response

Prisma logs

No response