refactor(validators): Simplify and refactor password validators

This commit refactors the password validation classes to improve clarity, reduce complexity, and align better with Django conventions.

The key changes include:
 - Removed the `BaseCountPasswordValidator` abstract base class, as it added unnecessary complexity. Each validator is now a self-contained class.
 - Simplified the logic within each validator, using more direct and efficient methods for character checks (e.g., `isascii()`, `isupper()`).
 - Renamed validator classes for conciseness (e.g., `ASCIIOnlyPasswordValidator` to `AsciiValidator`).
 - Improved internationalization and pluralization of error messages by using `ngettext`.
 - Updated `settings.py` to reflect the new validator class names and their simplified options.

Author: RandomProgramm3r

promo_code/promo_code/settings.py

@@ -178,27 +178,23 @@ def load_bool(name, default):
         '.NumericPasswordValidator',
     },
     {
-        'NAME': 'promo_code.validators.ASCIIOnlyPasswordValidator',
+        'NAME': 'promo_code.validators.AsciiValidator',
     },
     {
-        'NAME': 'promo_code.validators.SpecialCharacterPasswordValidator',
-        'OPTIONS': {'min_count': 1},
+        'NAME': 'promo_code.validators.SpecialCharacterValidator',
+        'OPTIONS': {'special_chars': '[@$!%*?&]'},
     },
     {
-        'NAME': 'promo_code.validators.NumericPasswordValidator',
-        'OPTIONS': {'min_count': 1},
+        'NAME': 'promo_code.validators.NumericValidator',
     },
     {
-        'NAME': 'promo_code.validators.LowercaseLatinLetterPasswordValidator',
-        'OPTIONS': {'min_count': 1},
+        'NAME': 'promo_code.validators.LowercaseValidator',
     },
     {
-        'NAME': 'promo_code.validators.UppercaseLatinLetterPasswordValidator',
-        'OPTIONS': {'min_count': 1},
+        'NAME': 'promo_code.validators.UppercaseValidator',
     },
 ]
 
-
 PASSWORD_HASHERS = [
     'django.contrib.auth.hashers.Argon2PasswordHasher',
     'django.contrib.auth.hashers.PBKDF2PasswordHasher',