chore: set max / preferred line lengths in prettier config

The current version of [prettier](https://prettier.io/docs/en/options.html) tries to enforce line widths around 80 characters unless there's another setting in place. We should probably have a preferred line width in place in our prettierrc.json. The absence of this setting is causing some odd behavior in forcing line-width changes in saved files on lines of code that are not being changed.

Here is [one example](https://github.com/influxdata/ui/pull/5740).

Inspect the repository's prettierrc.json and read the linked Prettier options documentation, then determine the intended maximum or preferred line width. Update the configuration so saved files do not reflow unrelated lines, and verify the behavior against the example in pull request 5740.

Written by the indexing model from the issue text.