fix(developer): support option stores in kmc-kmn/kmw

Adds support for option stores to kmc-kmn/kmw-compiler. This required
adding the relevant store metadata into the output from kmcmplib, and
so I also tidied up the corresponding WASM interfaces slightly more in
the process.

Added unit test for the options store.

While testing this, ran into a second bug with the way I ported a
constant from Delphi to Typescript in constants.ts, so fixed that and
added a corresponding unit test. Small steps, but good ones.