IDE incorrectly caches schematic-defined blocks

[ducky64]

Because the HDL doesn't change, the IDE never knows to invalidate the previously compiled version.

Simple option: IDE never caches schematic-defined files, by hardcoding the class name

More advanced option: a class in the Block hierarchy directs the IDE to not cache subclasses

The most general option: A class in the Block hierarchy defines a function that evaluates to a caching key - in this case, it can be the schematic last-modified-date or hash. Every compiler run, either all blocks have their caching key updated (which can be inefficient), or blocks can be invalidated-on-first-use (more complex).