Add setup function, add required folders to path

Author: jbentvelsen

examples/ophys_training_inference.mlx

@@ -0,0 +1,8 @@
+function setup()
+    % Add current directory and sample_data, layers and exmamples to path
+    setup_path = fileparts(mfilename('fullpath'));
+    addpath(setup_path);
+    addpath(fullfile(setup_path, "network_layers"))
+    addpath(fullfile(setup_path, "sample_data"))
+    addpath(fullfile(setup_path, "examples"))
+end