docs(calendar): some mild re-jigging of wording and examples

[ianmcburnie]

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

Description

Some docs changes to improve the reading flow and layered in complexity from readonly to interactive.

I added some days that contain links in the readonly example.

I removed the calendar-month.html include as I found it easier just to edit things manually rather than deal with all the conditional logic in the template. This will become easier when we switch from Jekyll to Marko.

Notes

I also added in aria-pressed on buttons for start and end dates.

I made some minor edits to date-text.html box too, and notice we are missing an example that shows tow textboxes for a date range.

Screenshots

Checklist

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

[LuLaValva]

Thanks for the docs changes Ian, this looks much better! Just a few typos and nitpicks, but once those are fixed I think this is a major improvement.

[ianmcburnie]

Added 2nd example to date-textbox: