Standardize and improve validation message templates

[alganet]

• Remove redundant "valid" prefix: Date, DateTime, DateTimeDiff, Domain, Email, Iban, Imei, Ip, Isbn, Json, LanguageCode, LeapDate, LeapYear, Luhn, MacAddress, NfeAccessKey, Nif, Nip, Pesel, Phone, Pis, PolishIdCard, PostalCode, Roman, Slug, Tld, Url, Uuid, Version.

• Remove redundant "value" suffix ArrayVal, BoolVal, Countable, FloatVal, IntVal, IterableVal, NumericVal, ScalarVal, StringVal.

• Standardize "consist only of" phrasing Alnum, Alpha, Cntrl, Consonant, Digit, Graph, Lowercase, Printable, Punct, Space, Spaced, Uppercase, Vowel, Xdigit.

• Improve file accessibility messages Directory, Executable, File, Image, Readable, SymbolicLink, Writable.

• Improve grammar and article usage CreditCard, Extension, Mimetype, Regex, Size.

[Copilot]

Pull request overview

This PR standardizes and improves validation message templates across the codebase by removing redundant qualifiers, improving grammar, and enhancing clarity.

Changes:

• Removed redundant "valid" prefixes from 34 validators (e.g., "must be a valid email" → "must be an email address")
• Removed redundant "value" suffixes from 9 type validators (e.g., "must be a string value" → "must be a string")
• Standardized "consist only of" phrasing for 15 character-set validators replacing inconsistent "contain only" or "contain" wording
• Improved file accessibility messages for 7 filesystem validators to be more explicit
• Enhanced grammar and article usage in 5 validators

Reviewed changes

Copilot reviewed 278 out of 278 changed files in this pull request and generated 4 comments.

File	Description
Multiple validator source files (src/Validators/*.php)	Updated message templates to remove "valid" prefix, "value" suffix, and standardize phrasing
Multiple test files (tests/feature/Validators/*.php)	Updated expected error messages to match new templates
Multiple documentation files (docs/validators/*.md)	Updated template examples and added changelog entries for version 3.0.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.53%. Comparing base (63f7753) to head (0b79638).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1670      +/-   ##
============================================
- Coverage     99.53%   99.53%   -0.01%     
- Complexity      923      928       +5     
============================================
  Files           190      190              
  Lines          2171     2169       -2     
============================================
- Hits           2161     2159       -2     
  Misses           10       10              

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