Decouple ValueObject from immutable-object and enforce strict equality.

[gustavofreze]

No description provided.

[Copilot]

Pull request overview

This PR decouples ValueObject from tiny-blocks/immutable-object and tightens equals() semantics by requiring same-class comparison and strict property equality, along with related documentation and tooling updates.

Changes:

• Removed the Immutable dependency from the ValueObject contract and dropped the immutability trait usage.
• Updated equals() to enforce same-class checks and strict comparison of object properties.
• Updated project tooling/docs (Infection config, CI actions versions, Makefile targets, README/FAQ, repo config files).

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/ValueObjectBehavior.php	Enforces same-class + strict get_object_vars() equality.
src/ValueObject.php	Removes Immutable extension from the public interface.
tests/ValueObjectTest.php	Adjusts equality test cases to match stricter semantics.
README.md	Updates guidance and adds FAQ describing strict equality behavior.
composer.json	Removes immutable-object dependency; refreshes metadata/dev tooling.
infection.json.dist	Changes mutator configuration.
.github/workflows/ci.yml	Updates artifact action versions; removes bcmath extension.
Makefile	Adds composer normalize to configure; adds show-outdated target.
.gitattributes	Adds normalization/diff driver settings and updates export-ignore list.
.editorconfig	Adds editor formatting defaults.
.github/copilot-instructions.md	Adds Copilot guidance referencing .claude/ rules.
.claude/**	Introduces repo-wide rules for modeling, testing, documentation, and workflows.

Comments suppressed due to low confidence (1)

src/ValueObject.php:22

• The docblock for equals() still states equality is based only on property values. After this change, equality also requires the same concrete class (and the comparison is strict), so the interface docs should be updated to reflect the actual contract.

    /**
     * Compares this ValueObject with another to determine if they are equal.
     * Two ValueObjects are considered equal if their properties have the same values.
     *
     * @param ValueObject $other The ValueObject to compare with.
     * @return bool True if the objects are equal, false otherwise.
     */

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