Try to automatically set instance as executable

Author: BluSpring

common/src/main/kotlin/xyz/bluspring/unitytranslate/translator/LocalLibreTranslateInstance.kt

@@ -110,6 +110,14 @@ class LocalLibreTranslateInstance private constructor(val process: Process, val
 
             clearDeadDirectories()
 
+            if (!source.canExecute()) {
+                if (!source.setExecutable(true)) {
+                    UnityTranslate.logger.error("Unable to start local LibreTranslate instance! You may have to manually set the execute permission on the file yourself!")
+                    UnityTranslate.logger.error("File path: ${source.absolutePath}")
+                    return
+                }
+            }
+
             val processBuilder = ProcessBuilder(listOf(
                 source.absolutePath,
                 "--update-models",