Add database configuration via command-line arguments

A new configuration setup now allows specifying a path for database properties via command-line arguments during application startup. This update also changes the call signature for `DatabaseConnection.initialize()` method to accept a path argument. Similarly, methods in `PropertiesLoader`, `PropertiesWriter`, and `MailSettings` classes were also updated to use the specified path when working with properties files. The `TestForm` class's tests were updated accordingly to handle these changes.

src/main/java/com/alttd/forms/properties/PropertiesLoader.java

@@ -6,6 +6,8 @@ import org.slf4j.LoggerFactory;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.net.URI;
+import java.nio.file.Path;
 import java.util.Optional;
 import java.util.Properties;
 
@@ -13,15 +15,21 @@ public class PropertiesLoader {
 
     private static final Logger logger = LoggerFactory.getLogger(PropertiesLoader.class);
 
-    public static Optional<Properties> loadProperties(String fileName) {
+    public static Optional<Properties> loadProperties(String path, String fileName) {
         Properties prop = new Properties();
-        Optional<File> currentJarPath = JarPath.getCurrentJarDir();
-        if (currentJarPath.isEmpty()) {
-            logger.error("Unable to find jar path to load properties (" + fileName + ")");
-            return Optional.empty();
+        File file;
+        if (path.isEmpty()) {
+            Optional<File> currentJarPath = JarPath.getCurrentJarDir();
+            if (currentJarPath.isEmpty()) {
+                logger.error("Unable to find jar path to load properties (" + fileName + ")");
+                return Optional.empty();
+            }
+            file = new File(currentJarPath.get(), fileName);
+        } else {
+            file = Path.of(URI.create("file://" + path + File.separator + fileName)).toFile();
         }
 
-        File file = new File(currentJarPath.get(), fileName);
+
         if (!file.exists()) {
             logger.warn("Tried to load properties file that doesnt exists (" + fileName + ")");
             return Optional.empty();