PSR-7 compliance in response status and stream IO.

[gustavofreze]

No description provided.

[Copilot]

Pull request overview

This PR aims to improve PSR-7 alignment around stream reading semantics and response status handling, and updates supporting tests and project tooling/docs accordingly.

Changes:

• Adjust stream behavior to follow PSR-7 expectations (notably getContents() reading from the current pointer; resource validity checks).
• Make ResponseInterface::withStatus() return a new response instead of throwing, and update tests to avoid pointer-consuming getContents() assertions.
• Refresh project configuration/docs (composer normalization, .editorconfig, .gitattributes, README, mutation-testing config).

Reviewed changes

Copilot reviewed 22 out of 23 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tests/ResponseTest.php	Updates response body assertions to use __toString() and replaces withStatus exception test with success-path test.
tests/RequestTest.php	Switches PHPUnit doubles from mocks to stubs for PSR-7 interfaces.
tests/Internal/Stream/StreamTest.php	Adds coverage for seekability when an underlying resource is externally closed.
tests/Internal/Stream/StreamFactoryTest.php	Switches PHPUnit doubles to stubs for stream behavior tests.
tests/Internal/Request/RouteParameterResolverTest.php	Switches request doubles to stubs.
tests/Drivers/Slim/SlimTest.php	Avoids getContents() pointer side effects by comparing bodies via __toString().
tests/Drivers/Laminas/LaminasTest.php	Avoids getContents() pointer side effects by comparing bodies via __toString().
src/Internal/Stream/Stream.php	Updates readability detection, getContents() semantics, and resource validity checks.
src/Internal/Response/InternalResponse.php	Implements withStatus() by returning a new response instance instead of throwing.
src/Internal/Exceptions/BadMethodCall.php	Removes an internal exception no longer used after withStatus() change.
infection.json.dist	Disables the ProtectedVisibility mutator.
composer.json	Normalizes metadata, updates dev dependencies, adds composer-normalize plugin config, and adjusts scripts ordering.
README.md	Updates package overview wording.
Makefile	Runs composer normalize during configure; adds show-outdated; updates help output.
.gitignore	Reorders .phpunit.* ignore entry.
.gitattributes	Adds LF normalization/diff drivers and revises export-ignore list.
.editorconfig	Adds editor configuration for consistent formatting.
.claude/rules/php-library-testing.md	Reflows/updates testing rules documentation.
.claude/rules/php-library-modeling.md	Adds new library modeling rules document.
.claude/rules/php-library-documentation.md	Refines documentation rules (including standalone examples requirement).
.claude/rules/php-library-code-style.md	Updates/expands code-style rules, including complexity and PSR-12 brace guidance.
.claude/rules/php-domain.md	Removes legacy domain rules document.
.claude/CLAUDE.md	Updates project description to library context and clarifies commands/formatting rules.