feat(Add Selection): add LocalizeItAction for localizing selected text

This commit introduces a new action, `LocalizeItAction`, into the easyi18n toolset, which allows users to automatically apply localization to a selected string in the text editor. The action is now accessible from the editor's context menu. This provides a more efficient way to localize selected strings compared to manually adding them.

src/main/java/de/marhali/easyi18n/action/LocalizeItAction.java

@@ -0,0 +1,43 @@
+package de.marhali.easyi18n.action;
+
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.CommonDataKeys;
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.project.Project;
+import de.marhali.easyi18n.dialog.AddDialog;
+import de.marhali.easyi18n.model.KeyPath;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * The LocalizeItAction class represents an IntelliJ IDEA action that localizes selected text.
+ *
+ * <p>When this action is performed, it retrieves the selected text from the editor, checks if it is not empty,
+ * and then displays a dialog to add the selected text as a localized string key to the project.
+ *
+ * <p>If the selected text is empty or the project is null, the action does nothing.
+ *
+ * <p>This class extends the AnAction class provided by IntelliJ IDEA.
+ */
+class LocalizeItAction extends AnAction {
+
+    @Override
+    public void actionPerformed(@NotNull AnActionEvent anActionEvent) {
+        DataContext dataContext = anActionEvent.getDataContext();
+        Editor editor = CommonDataKeys.EDITOR.getData(dataContext);
+        if (editor == null)
+            return;
+        String text = editor.getSelectionModel().getSelectedText();
+        if (text == null || text.isEmpty())
+            return;
+
+        Project project = anActionEvent.getProject();
+        if (project == null) {
+            throw new RuntimeException("Project is null!");
+        }
+
+        AddDialog dialog = new AddDialog(project, new KeyPath(text), text);
+        dialog.showAndHandle();
+    }
+}

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

@@ -22,6 +22,13 @@
         >
             <add-to-group group-id="NewGroup"/>
         </action>
+        <action id="de.marhali.easyi18n.action.LocalizeItAction"
+                class="de.marhali.easyi18n.action.LocalizeItAction"
+                text="Localize It"
+                description="Apply localization to the selected string"
+                icon="/icons/translate13.svg">
+            <add-to-group group-id="EditorPopupMenu" anchor="last"/>
+        </action>
     </actions>
 
     <extensions defaultExtensionNs="com.intellij">