release the first version with unit tests

[yegor256]

Let's release the first version, with a series of unit tests, where each test does the following:

• Takes a .eo file from src/test/resources/org/eolang/normalizer/
• Compiles it and executes with the help of eo-maven-plugin, through Farea (no need to use maven-invoker-plugin)
• Remembers the result of the execution (stdout1)
• Compiles it, but with the use of the normalizer-maven-plugin that is supposed to modify .phi files, generated by eo-maven-plugin
• Compares the result (stdout2) with the previous output (stdout1)

So far, the normalizer-maven-plugin doesn't need to do any modifications to .phi files.

[yegor256]

@volodya-lombrozo can you please help us implement this (after objectionary/eo#2684 is fixed)

[volodya-lombrozo]

@yegor256 Of course

[yegor256]

@volodya-lombrozo put this work on hold, please. Most probably, we won't need this plugin at all, since its job will be done by the ineo-maven-plugin