unified test binary

[pointbazaar]

put the tests for lexer, parser, ast, rat, compiler, ... into one binary.

This will help to expose the utility functions (test durations, etc) and any further developments there to all the tests.

So we can see how many tests we ran in total and also how long everything took all together.

The sources for that could be put into

~/espl1000/test/

folder.

It will also make the CI alot simpler since there is only one binary that needs to be in the PATH, and only one to run.