Just list what each level does instead of a complicated if-then bullet list. It's still shorter anyway.
Also add a note that this only applies to REPL code in case of Pybricks.
This merges the useful information from two different places:
- The original docstring for const.
- Writing MicroPython code for constrained devices.
Also reduce type to just int, because only ints are supported.
TConst does not exist, so adding it makes it a bit harder to read than needed. The const() "function" will take int or float, and the return value can be used as such, even if it is optimized out. This is described in the docstring, so we can leave out the additional type.
Also adds autofunctions in place of one auto module so we can move things around as needed. Also fix cross links with usys to get the build to pass before we update that module.