Created draft TUI app and .tcss file with some arbitrary parameters f…

…or testing.

datashuttle/tui/css/tab_content.tcss

@@ -0,0 +1,9 @@
+Screen {
+    padding: 0;
+}
+TabbedContent {
+    width: 100%
+}
+#create_text {
+    text-style: italic;
+}

datashuttle/tui/view/app.py

@@ -0,0 +1,27 @@
+from pathlib import Path
+
+from textual.app import App, ComposeResult
+from textual.widgets import Header, Label, TabbedContent, TabPane
+
+# from textual import events
+
+
+class MyApp(App):
+    TITLE = "DataShuttle"
+
+    tui_path = Path(__file__).parents[1]
+    CSS_PATH = rf"{tui_path}\css\tab_content.tcss"
+
+    def compose(self) -> ComposeResult:
+        yield Header()
+        # yield Label("Do you love DataShuttle?", id = "question")
+        with TabbedContent():
+            with TabPane("Create", id="create"):
+                yield Label("Create", id="create_text")
+            with TabPane("Transfer", id="transfer"):
+                yield Label("Transfer; Seems to work!")
+
+
+if __name__ == "__main__":
+    app = MyApp()
+    app.run()