Improve bootstrap

bootstrap.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/bash
 
 # Fetch all submodule content.
-git submodule update --force --recursive --init --remote
+git submodule update --force --recursive --init

settings.gradle.kts

@@ -4,9 +4,13 @@ plugins {
 
 rootProject.name = "Chat-OG"
 
-exec {
-    workingDir(rootDir)
-    commandLine("sh", "bootstrap.sh")
+val process: Process = ProcessBuilder("sh", "bootstrap.sh")
+    .directory(rootDir)
+    .start()
+
+val exitValue = process.waitFor()
+if (exitValue != 0) {
+    throw GradleException("bootstrap.sh failed with exit code $exitValue")
 }
 
 include("libs:Utilities-OG")