example: add .gitignore

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

example/logger/csv_2_plot.py

@@ -1,7 +1,7 @@
 import argparse
-
 import matplotlib.dates as mdates
 import matplotlib.pyplot as plt
+import os
 import pandas as pd
 
 
@@ -88,7 +88,7 @@ def plot_power_data(csv_path, output_path, plot_types):
 
 
 def main():
-    parser = argparse.ArgumentParser(description="Generate a plot from an Odroid PowerMate CSV log file.")
+    parser = argparse.ArgumentParser(description="Generate a plot from an Odroid Smart Power CSV log file.")
     parser.add_argument("input_csv", help="Path to the input CSV log file.")
     parser.add_argument("output_image", help="Path to save the output plot image (e.g., plot.png).")
     parser.add_argument(