Use table for default values

[chenxsan]

Closes #6356

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Name	Status	Preview	Updated
webpack-js-org	✅ Ready (Inspect)	Visit Preview	Aug 31, 2022 at 2:23PM (UTC)

[caseyjhol]

Is it the goal of this PR to update all the defaults in the docs as well (i.e. using values from https://github.com/webpack/webpack/blob/main/lib/config/defaults.js)?

[chenxsan]

Is it the goal of this PR to update all the defaults in the docs as well (i.e. using values from https://github.com/webpack/webpack/blob/main/lib/config/defaults.js)?

Yes, will likely update all the defaults under the Configuration section unless the case doesn't fit well with a table.