新增sql连接，目前支持mysql、sqlite、oracle连接以及相关数据库操作

src/mainwindow/mainwindow.cpp

@@ -0,0 +1,44 @@
+#include "mainwindow.h"
+#include "pages/DatabaseManagerPage.h"
+#include "utils/logmanager.h"
+MainWindow::MainWindow(QWidget* parent)
+    : ElaWindow(parent)
+{
+    initWindow();
+    initContent();
+
+    LogManager::instance()->initLogFile();
+    LogManager::instance()->logInfo("应用程序启动");   
+    
+    connect(this, &ElaWindow::navigationNodeClicked, this, &MainWindow::onNavigationNodeClicked);
+}
+
+MainWindow::~MainWindow()
+{
+}
+
+void MainWindow::initWindow()
+{
+    setWindowTitle(QString("Omnitool"));
+    setWindowIcon(QIcon(":/resources/images/gjx.png"));
+    resize(900, 600);
+    setMinimumSize(800, 500);
+    setUserInfoCardVisible(false);
+    
+    // 隐藏返回和前进按钮
+
+    setWindowButtonFlag(ElaAppBarType::RouteBackButtonHint, false);
+    setWindowButtonFlag(ElaAppBarType::RouteForwardButtonHint, false);
+}
+
+void MainWindow::initContent()
+{
+    DatabaseManagerPage* dbPage = new DatabaseManagerPage(this);
+    addPageNode("SQL", dbPage, ElaIconType::Database);
+}
+
+void MainWindow::onNavigationNodeClicked(ElaNavigationType::NavigationNodeType nodeType, QString nodeKey)
+{
+    Q_UNUSED(nodeType);
+    navigation(nodeKey);
+}