Bootstrap the jackcompiler test package.

10_compiler_i_syntax_analysis/test/(__init__, __main__).py
	-Bootstrap the `jackcompiler` package's unit-test package,
	`test`.
	-Add an `__init__.py` with a `run_tests()` inside, which
	automagically executes all unit-test files in the package.
	Add docstrings to `run_tests()` and the module header.