DevTools: Introduce SQL Studio

SQL Studio is a graphical SQL manager program that allows the user
to create and edit SQL scripts.

Userland/DevTools/SQLStudio/ScriptEditor.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2022, Dylan Katz <dykatz@uw.edu>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/LexicalPath.h>
+#include <LibGUI/TextEditor.h>
+
+namespace SQLStudio {
+
+class ScriptEditor : public GUI::TextEditor {
+    C_OBJECT(ScriptEditor)
+
+public:
+    virtual ~ScriptEditor() = default;
+
+    void new_script_with_temp_name(String);
+    ErrorOr<void> open_script_from_file(LexicalPath const&);
+
+    ErrorOr<bool> save();
+    ErrorOr<bool> save_as();
+    ErrorOr<bool> attempt_to_close();
+
+private:
+    ScriptEditor();
+
+    String m_path;
+};
+
+}