fix: reintroduce app.py

app.py

@@ -0,0 +1,36 @@
+import gradio as gr
+
+from src.distilabel_dataset_generator.apps.faq import app as faq_app
+from src.distilabel_dataset_generator.apps.sft import app as sft_app
+
+theme = gr.themes.Monochrome(
+    spacing_size="md",
+    font=[gr.themes.GoogleFont("Inter"), "ui-sans-serif", "system-ui", "sans-serif"],
+)
+
+css = """
+h1{font-size: 2em}
+h3{margin-top: 0}
+#component-1{text-align:center}
+.main_ui_logged_out{opacity: 0.3; pointer-events: none}
+.tabitem{border: 0px}
+.group_padding{padding: .55em}
+#space_model .wrap > label:last-child{opacity: 0.3; pointer-events:none}
+#system_prompt_examples {
+    color: black;
+}
+"""
+
+
+demo = gr.TabbedInterface(
+    [sft_app, faq_app],
+    ["Supervised Fine-Tuning", "FAQ"],
+    css=css,
+    title="⚗️ distilabel Dataset Generator",
+    head="⚗️ distilabel Dataset Generator",
+    theme=theme,
+)
+
+
+if __name__ == "__main__":
+    demo.launch()