feat(#879): extract name-validation logic into Vocabulary class

[volodya-lombrozo]

Extracts name-validation logic from LtTestNotVerb into a dedicated Vocabulary class and moves the comprehensive parametrized tests there, keeping LtTestNotVerbTest lean with only a few representative end-to-end cases.

Fixes #879

[volodya-lombrozo]

@rultor merge

[rultor]

@rultor merge

@volodya-lombrozo OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor merge

@volodya-lombrozo Done! FYI, the full log is here (took me 6min).

[0crat]

@volodya-lombrozo Thanks for the contribution! You've earned +12 points for this: +16 as a basis, +16.95 for your 339 hits-of-code (339 × 0.05), but -4 deducted since you exceeded 100 hits-of-code and -16.95 to cap the HoC bonus at 16 points maximum. According to our policy, contributions over 100 hits-of-code receive penalties to encourage quality over quantity. Your running score is +295 - keep up the great work and don't forget to check your Zerocracy account! 🚀