refactor: Restructure project, enhance ActionField and DTOField generation

This commit refactors the project structure by moving generator-related classes
to a new package (`com.sdk.generators.actionmodels`) and standardizing
template directory names (`src/main/resources/templates`).

It introduces new FreeMarker templates (`actionDTO.ftl`, `actionDTO.extend.ftl`)
and corresponding logic in `GeneratorServices.java` to support the generation
of Data Transfer Object (DTO) classes alongside ActionBeans. The changes
also involve enhancements related to `ActionField` and `DTOField` generation.

Updates to `build.gradle.kts`, `plugin.xml`, and Gradle wrapper files
reflect these structural and functional enhancements.

src/main/resources/META-INF/plugin.xml

@@ -1,7 +1,7 @@
 <!-- Plugin Configuration File. Read more: https://plugins.jetbrains.com/docs/intellij/plugin-configuration-file.html -->
 <idea-plugin>
     <!-- Unique id for this plugin. Must stay constant for the life of the plugin. -->
-    <id>com.sdk.actionbean.generator</id>
+    <id>com.sdk.generators.actionmodels</id>
     <name>Database Action Models Generator</name>
     <vendor>Sakda Sakprapakorn</vendor>
 
@@ -16,13 +16,17 @@
 
     <actions>
         <!-- Defines an action that will appear in the context menu for project directories -->
-        <action id="ActionModelGenerator.GenerateAction"
-                class="com.sdk.actionbean.generator.GenerateBeanAction"
-                text="Generate Database Action Models"
+        <action id="com.sdk.generators.actionmodels.GenerateBeanAction"
+                class="com.sdk.generators.actionmodels.GenerateBeanAction"
+                text="Generate Action Models"
                 description="Generates ActionBean classes from a database schema.">
-            <add-to-group group-id="GenerateGroup" anchor="first"/>
-            <!-- This makes the action visible only when right-clicking a source package -->
+            <add-to-group group-id="DatabaseViewPopupMenu" anchor="first"/>
             <keyboard-shortcut keymap="$default" first-keystroke="ctrl alt G"/>
         </action>
     </actions>
+
+    <!-- in plugin.xml, inside the <extensions defaultExtensionNs="com.intellij"> tag -->
+    <extensions defaultExtensionNs="com.intellij">
+        <notificationGroup id="Action-Models-Generator-Notification" displayType="BALLOON" isLogByDefault="true"/>
+    </extensions>
 </idea-plugin>