add code to display spectogram

src/spectogram/display.py

@@ -0,0 +1,18 @@
+import matplotlib.pyplot as plt
+import librosa.display
+import numpy as np
+
+def display_spectrogram(spec_array: np.ndarray, plot_data: dict):
+    """
+    Displays a spectrogram array using Matplotlib.
+
+    Args:
+        spec_array (np.ndarray): Spectrogram array (in decibels).
+        plot_data (dict): Metadata for plotting (e.g., sr, x_axis, y_axis).
+    """
+    plt.figure(figsize=(10, 4))
+    librosa.display.specshow(spec_array, sr=plot_data['sr'], x_axis=plot_data['x_axis'], y_axis=plot_data['y_axis'])
+    plt.colorbar(format='%+2.0f dB')
+    plt.title(f"Spectrogram ({plot_data['y_axis'].upper()} axis)")
+    plt.tight_layout()
+    plt.show()