Extract handlers, adopt Fluent NamespaceLookup, update docs

[alganet]

Move Error, Exception and Status from Routes/ to Handlers/ as standalone handler classes. Replace the internal sideRoutes array with appendHandler() on Router. Rename exceptionRoute()/errorRoute()/ statusRoute() to onException()/onError()/onStatus().

Use Fluent's NamespaceLookup for routine instantiation in AbstractRoute, replacing manual reflection-based class resolution.

Update docs/README.md error handling section to reflect the new handler API and add onStatus() example.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.40%. Comparing base (0f1843b) to head (aa633a5).

Files with missing lines	Patch %	Lines
src/Router.php	88.88%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #180      +/-   ##
============================================
- Coverage     96.66%   96.40%   -0.27%     
- Complexity      403      407       +4     
============================================
  Files            31       31              
  Lines          1020     1028       +8     
============================================
+ Hits            986      991       +5     
- Misses           34       37       +3     

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[Copilot]

Pull request overview

This PR refactors error/exception/status handling by extracting them into dedicated handler classes, updates the Router API to register these handlers fluently, and replaces reflection-based routine instantiation with Fluent’s NamespaceLookup. Documentation and examples are updated accordingly.

Changes:

• Introduce Handlers\*Handler classes and replace exceptionRoute/errorRoute/statusRoute with onException/onError/onStatus.
• Replace manual reflection routine instantiation with Respect\Fluent\Factories\NamespaceLookup in Router and AbstractRoute.
• Update dispatch plumbing (RouteProvider, DispatchEngine, DispatchContext) and docs/examples/tests to the new handler API.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/Routes/StatusTest.php	Updates tests to use onStatus() and new handler class coverage.
tests/Routes/ExceptionTest.php	Updates tests to use onException() and new handler class coverage.
tests/Routes/ErrorTest.php	Updates tests to use onError() and new handler class coverage.
tests/RouterTest.php	Updates router tests to the renamed exception handler API.
src/Routes/AbstractRoute.php	Switches magic routine creation to NamespaceLookup and adds lookup injection.
src/Router.php	Adds handler registration APIs, replaces side-routes with handlers, and adds routine lookup support.
src/RouteProvider.php	Renames side-route accessor to getHandlers().
src/Handlers/StatusHandler.php	Adds standalone status handler class under Handlers.
src/Handlers/ExceptionHandler.php	Adds standalone exception handler class under Handlers.
src/Handlers/ErrorHandler.php	Adds standalone error handler class under Handlers.
src/DispatchEngine.php	Wires handlers into the dispatch context via setHandlers().
src/DispatchContext.php	Updates forwarding/catching logic to use handlers and avoid handler recursion.
example/full.php	Updates example code to use onException() / onError().
docs/README.md	Updates error handling docs and adds onStatus() example.
composer.json	Adds respect/fluent dependency.

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