Refactoring: improve code

[asolntsev]

No description provided.

[what-the-diff]

PR Summary

• Enhanced Readability in SingletonLocale, FakeStream, FakeValues, FakeValuesContext and FakerContext Classes
  By adding formatted strings in the toString methods of the aforementioned classes, we have improved the readability of these components. This could lead to easier debugging and a better understanding of the underlying logic.

• Improved Testing of Address Class
  We have enhanced the robustness of our AddressTest class by adding a StringMatcher condition and Pattern. Additionally, we've also added parameterized tests for Latin and Cyrillic street names, complete with assertions for Cyrillic street names. These additions will help ensure our Address class behaves correctly for a wider variety of street names, especially those from different languages and character sets.

• Added UniqueTest Class Improvements
  The UniqueTest class has received some significant additions: a new formatted string in the toString method for readability, and a new static variable with corresponding assertions. These will ensure better test coverage and provide deeper insights into the behavior of the unique aspects of our system.

• Static Variable Addition to ProvidersDocsGenerator
  A new static variable was added to the ProvidersDocsGenerator class, likely to maintain some globally required info or configuration. This could help the class perform its functions more effectively.

[snuyanzin]

IIRC this doesn't cover ёЁ, may be some other cyrillic letters

[asolntsev]

That's right, these are SOME cyrillic letters, not ALL cyrillic letters.
I think it's good enough for this specific test.

[kingthorin]

I don't disagree but incase there's a need in the future you can use the character class \p{IsCyrillic}