Updated gradio interface

Now it uses our base classes and is way shorter. Got rid of more than
200 lines of code. I opened an issue https://github.com/gradio-app/gradio/issues/9273
regarding interrupting chain of events.
Deleted or moved some files like notebooks, which shouldnt be part of the package.

qim3d/cli.py

@@ -32,6 +32,9 @@ def main():
     gui_parser.add_argument(
         "--local-thickness", action="store_true", help="Run local thickness tool."
     )
+    gui_parser.add_argument(
+        "--layers", action="store_true", help="Run Layers."
+    )
     gui_parser.add_argument("--host", default="0.0.0.0", help="Desired host.")
     gui_parser.add_argument(
         "--platform", action="store_true", help="Use QIM platform address"
@@ -127,6 +130,8 @@ def main():
             interface_class = qim3d.gui.annotation_tool.Interface
         elif args.local_thickness:
             interface_class = qim3d.gui.local_thickness.Interface
+        elif args.layers:
+            interface_class = qim3d.gui.layers2d.Interface
         else:
             print(
                 "Please select a tool by choosing one of the following flags:\n\t--data-explorer\n\t--iso3d\n\t--annotation-tool\n\t--local-thickness"

qim3d/gui/__init__.py

@@ -4,6 +4,7 @@ from . import data_explorer
 from . import iso3d
 from . import local_thickness
 from . import annotation_tool
+from . import layers2d
 from .qim_theme import QimTheme
 
 

qim3d/process/__init__.py

-from .layers2d import Layers2d
\ No newline at end of file

qim3d/viz/__init__.py

+from . import colormaps
+from .cc import plot_cc
+from .detection import circles
+from .explore import (
+    interactive_fade_mask,
+    orthogonal,
+    slicer,
+    slices,
+)
+from .k3d import vol
+from .local_thickness_ import local_thickness
+from .structure_tensor import vectors
+from .metrics import plot_metrics, grid_overview, grid_pred, vol_masked
+from .preview import image_preview
+from . import layers2d
\ No newline at end of file

qim3d/viz/layers2d.py

 """ Provides a collection of visualisation functions for the Layers2d class."""
 import matplotlib.pyplot as plt
 import numpy as np
-from qim3d.process import layers2d as l2d
+from qim3d.processing import layers2d as l2d
 
 def create_subplot_of_2d_arrays(data, m_rows = 1, n_cols = 1, figsize = None):
     '''