Working forward pass for triplet layers.

tests/test_triplet.py

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+from manim import *
+from manim_ml.neural_network.layers import TripletLayer, triplet
+from manim_ml.neural_network.layers.feed_forward import FeedForwardLayer
+from manim_ml.neural_network.neural_network import NeuralNetwork
+
+config.pixel_height = 720
+config.pixel_width = 1280
+config.frame_height = 6.0
+config.frame_width = 6.0
+
+class TripletScene(Scene):
+
+    def construct(self):
+        anchor_path = "../assets/triplet/anchor.jpg"
+        positive_path = "../assets/triplet/positive.jpg"
+        negative_path = "../assets/triplet/negative.jpg"
+        
+        triplet_layer = TripletLayer.from_paths(anchor_path, positive_path, negative_path, grayscale=False)
+
+        triplet_layer.scale(0.08)
+
+        neural_network = NeuralNetwork([
+            triplet_layer, 
+            FeedForwardLayer(5),
+            FeedForwardLayer(3)
+        ])
+
+        neural_network.scale(1)
+
+        self.play(Create(neural_network), run_time=3)
+
+        self.play(neural_network.make_forward_pass_animation(), run_time=10)