docs(list): added bulleted list and reordered fieldset examples

[agliga]

• This PR contains CSS changes
• This PR does not contain CSS changes

Description

• Added bulleted list example
• Moved fieldset example to the bottom

Checklist

• I verify the build is in a non-broken state
• I verify all changes are within scope of the linked issue

[changeset-bot]

⚠️ No Changeset found

Latest commit: cfd407d

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[ArtBlue]

Looks fine to me.

[ianmcburnie]

So, I noticed something else. In VoiceOver none of the list semantics are being announced. I believe this is a Safari "feature", when list-style is removed it also removes the semantics (sigh). A solution in the past was always to add role=list onto the ul/ol, but it seems there might be a better way now:

https://medium.com/@havard.brynjulfsen/removing-list-style-on-lists-and-the-accessibility-implications-that-follow-2392f5ddb332

[ArtBlue]

Converting this to a draft PR.

As agreed offline to the following:

1. We'll hold off on these changes for this release.
2. Remove <ol> docs from 18.5.0.
3. Add in the <ol> docs here for a holistic solution with <ul>.
4. Target this for 19.0.0.