feat: add general test fixture, update HTTP server & FastCGI tests, format PHP stack trace on HTTP 500

Author: ktaeyln

index.d.ts

@@ -1,7 +1,7 @@
 export { PHPEngine, PHPEngineOptions } from "./src/PHPEngine";
 export { PHPContext, PHPContextOptions } from "./src/PHPContext";
 export { PHPExtension } from "./src/PHPExtension";
-export { PHPError, PHPException, PHPTypeError, PHPParseError, PHPFatalError, PHPNotice, PHPWarning, ErrorException, } from "./src/runtime/errors/PHPError";
+export { PHPError, PHPException, PHPTypeError, PHPParseError, PHPFatalError, PHPNotice, PHPWarning, PHPExit, ErrorException, } from "./src/runtime/errors/PHPError";
 export { PHPObject, PHPClass, PHPMethodMetadata, PHPPropertyMetadata, PHPParameterMetadata } from "./src/runtime/objects/PHPObject";
 export { Superglobals } from "./src/runtime/superglobals/Superglobals";
 export { OutputBufferStack } from "./src/runtime/output/OutputBuffer";

index.js

@@ -9,6 +9,7 @@ export {
   PHPFatalError,
   PHPNotice,
   PHPWarning,
+  PHPExit,
   ErrorException,
 } from "./src/runtime/errors/PHPError";
 export { PHPObject, PHPClass, PHPMethodMetadata, PHPPropertyMetadata, PHPParameterMetadata } from "./src/runtime/objects/PHPObject";