True and False blocks

Simple true and false blocks have been suggested multiple times in the Scratch forums, so I thought I would bring it up here. Of course this is already possible by using the words true and false, but it's easier to just drag a block without typing anything. I've also seen some Scratchers use things like not<> or not<not<>> for Boolean values because it was faster than typing the word true or comparing 1 to 1 which makes the code very hard for other Scratchers to understand. If these two blocks get implemented, it would also make since to allow reporters in Boolean slots, so a variable that's set to true with the true and false blocks don't need to be compared to anything.

The issue does not name files, tests, or entry points. Start by locating the existing Boolean blocks and the handling of Boolean inputs, then determine how standalone true and false blocks would fit with reporter values. Done means the blocks are available and Boolean reporters can be used directly in Boolean slots, with coverage for the resulting behavior.