added example app

crystal_toolkit/apps/examples/chgcar.py

@@ -0,0 +1,29 @@
+#%%
+from __future__ import annotations
+
+import dash
+from dash import html
+from pymatgen.core import Lattice, Structure
+
+import crystal_toolkit
+import crystal_toolkit.components as ctc
+from crystal_toolkit.settings import SETTINGS
+from dash_mp_components import CrystalToolkitScene
+from pymatgen.io.vasp import Chgcar
+
+
+app = dash.Dash(assets_folder=SETTINGS.ASSETS_PATH)
+
+chgcar = Chgcar.from_file("../../../tests/test_files/chgcar.vasp")
+scene = chgcar.get_scene(isolvl=0.0001)
+
+layout = html.Div(
+            [CrystalToolkitScene(data=scene.to_json())],
+            style={"width": "100px", "height": "100px"},
+        )
+#%%
+# as explained in "preamble" section in documentation
+ctc.register_crystal_toolkit(app=app, layout=layout)
+
+if __name__ == "__main__":
+    app.run(debug=True, port=8050)