Add v::format() to check if data is already in a specific format

[alganet]

This validator is not so much about how we present the input during error messages, but in what format data already is formatted.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.54%. Comparing base (16148e9) to head (a279ae4).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1673   +/-   ##
=========================================
  Coverage     99.53%   99.54%           
- Complexity      928      932    +4     
=========================================
  Files           190      191    +1     
  Lines          2169     2182   +13     
=========================================
+ Hits           2159     2172   +13     
  Misses           10       10           

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[Copilot]

Pull request overview

This pull request adds a new Format validator that checks whether input data is already formatted in a specific way. The validator accepts a Formatter from the Respect\StringFormatter library and validates that applying the formatter to the input produces the same result as the input itself.

Changes:

• Adds new Format validator class with formatter-based validation logic
• Adds comprehensive unit and feature tests covering various formatting scenarios
• Updates all mixin interfaces (Builder, Chain, and their prefixed variants) to include the new validator
• Adds documentation and examples for the Format validator
• Adds FormatterBuilder alias as 'f' in aliases.php

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Validators/Format.php	Core validator implementation that compares input with formatted output
tests/unit/Validators/FormatTest.php	Unit tests with valid/invalid input providers
tests/feature/Validators/FormatTest.php	Feature tests covering various usage scenarios
src/Mixins/*.php	Interface updates adding format methods to all mixin chains
docs/validators/Format.md	Complete validator documentation with examples
docs/validators.md	Updates to include Format in validator lists
aliases.php	Adds 'f' alias for FormatterBuilder

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