Now that the EuiText has a new use case, Docs, we should update the ordered list styles to follow a more standard documentation system.

The current ordered list in EUI is decimal:

As @glitteringkatie pointed out in https://github.com/elastic/docsmobile/pull/411:

I feel like most standard systems go decimal > lower-alpha > lower-numeral. Github flips lower-alpha and lower-numeral around.

1. A thing
   1. Another point
2. A different point
   1. With nested
      1. points
         1. that are
            1. pointy

We can also take a look at the description lists. As pointed out by QA in https://github.com/elastic/docs-migration/issues/35#issuecomment-1385913717:

It's easier for people to parse when definitions are indented relative to their associated terms.