Fix compatability issue with 2025 api

Author: waleedyaseen

src/main/kotlin/io/runescript/plugin/ide/neptune/NeptuneAutoImportAware.kt

@@ -1,5 +1,6 @@
 package io.runescript.plugin.ide.neptune
 
+import ai.grazie.utils.emptyLinkedSet
 import com.intellij.openapi.components.service
 import com.intellij.openapi.externalSystem.ExternalSystemAutoImportAware
 import com.intellij.openapi.project.Project
@@ -21,9 +22,9 @@ class NeptuneAutoImportAware : ExternalSystemAutoImportAware {
         return file.parent
     }
 
-    override fun getAffectedExternalProjectFiles(projectPath: String, project: Project): MutableList<File>? {
+    override fun getAffectedExternalProjectFiles(projectPath: String, project: Project): MutableList<File> {
         val settings = project.service<NeptuneSettings>()
-        val projectSettings = settings.getLinkedProjectSettings(projectPath) ?: return null
+        val projectSettings = settings.getLinkedProjectSettings(projectPath) ?: return mutableListOf()
         val neptuneToml = File(projectSettings.externalProjectPath, "neptune.toml")
         return Collections.singletonList(neptuneToml)
     }

src/main/kotlin/io/runescript/plugin/ide/neptune/NeptuneManager.kt

@@ -72,7 +72,7 @@ class NeptuneManager :
         return autoImport.getAffectedExternalProjectPath(changedFileOrDirPath, project)
     }
 
-    override fun getAffectedExternalProjectFiles(projectPath: String, project: Project): MutableList<File>? {
+    override fun getAffectedExternalProjectFiles(projectPath: String, project: Project): MutableList<File> {
         return autoImport.getAffectedExternalProjectFiles(projectPath, project)
     }