Textlint: add rule for ID

[chalin]

From The Chicago Manual of Style:

"ID" is an initialism (http://www.chicagomanualofstyle.org/16/ch10/ch10_sec002.html) and should be capitalized and used without periods.

[svrnm]

👍 ... while looking for the PHP stuff I saw that the textlint plugin also has some defaults you can load:

https://github.com/sapegin/textlint-rule-terminology/blob/master/terms.jsonc

We could enable it and see if it fits?

[chalin]

Sure, let's give it a try. If we adopt it, we can trim our own ruleset.

[svrnm]

fixed