add sse support

[withinboredom]

Add native SSE support.

Usage:

class ApiRoute {
  #[SseRoute(Method::GET, '/api/events')]
  public function setupEvents(): Generator {
     yield myMessage();
  }
}

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -1.37 ⚠️

Comparison is base (7516b8f) 29.83% compared to head (79f53b1) 28.47%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #41      +/-   ##
============================================
- Coverage     29.83%   28.47%   -1.37%     
- Complexity      435      456      +21     
============================================
  Files            54       58       +4     
  Lines          1297     1359      +62     
============================================
  Hits            387      387              
- Misses          910      972      +62     

Impacted Files	Coverage Δ
src/Hooks/Api/Invoker.php	0.00% <0.00%> (ø)
src/Hooks/Api/SSE/Preprocessor.php	0.00% <0.00%> (ø)
src/Hooks/Api/SSE/Processor.php	0.00% <0.00%> (ø)
src/LifecyleHooks.php	0.00% <0.00%> (ø)
src/Router/Attributes/SseRoute.php	0.00% <0.00%> (ø)
src/Router/MagicRouter.php	0.00% <0.00%> (ø)
src/Router/SseMessage.php	0.00% <0.00%> (ø)

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