Add preInstall stage

Author: crazywhalecc

src/StaticPHP/Package/PackageInstaller.php

@@ -155,6 +155,7 @@ public function run(bool $disable_delay_msg = false): void
         }
 
         $this->reconcilePhpSrcVersion();
+        $this->emitPreInstallEvents();
 
         if ($this->interactive && !$disable_delay_msg) {
             // show install or build options in terminal with beautiful output
@@ -361,6 +362,15 @@ public function isPackageInstalled(Package|string $package_name): bool
         return false;
     }
 
+    public function emitPreInstallEvents(): void
+    {
+        foreach ($this->packages as $package) {
+            if ($package->hasStage('preInstall')) {
+                $package->runStage('preInstall');
+            }
+        }
+    }
+
     public function emitPostInstallEvents(): void
     {
         foreach ($this->packages as $package) {