Add E2E test for converting a boolean column to a text column

[seancolsen]

Context

See #1122 for more info and instructions on writing E2E tests.

This test

Write an E2E test which asserts that "converting a boolean column to a text column" works as-expected. Here's a visual demo of what the test should do:

Tips

• Assert that the text "true" and "false" display correctly

[sahilsaini1107]

@seancolsen may you assign this issue to me.

[sahilsaini1107]

Also, I want to ask one thing, how can we add true false entries in textarea while writing the test. As we are adding 2 and 3. May you please guide me with that.

page.fill("textarea", "foo,bar\n2,3")