fix: resolve data files relative to script directory

Budget Tracker and Productivity Pet were using bare filenames for their
persistent data files, causing data to be written to the current working
directory instead of the script's own directory. Running from a different
path would silently create a new empty data file, losing all prior data.

Author: nyxsky404

utilities/Budget-Tracker/budget_tracker.py

@@ -10,7 +10,7 @@
 from datetime import datetime
 from collections import defaultdict
 
-DATA_FILE = "budget_data.csv"
+DATA_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "budget_data.csv")
 FIELDNAMES = ["date", "type", "category", "description", "amount"]
 
 # ─────────────────────────────────────────────

utilities/Productivity-Pet/Productivity-Pet.py

@@ -6,7 +6,7 @@
 import os
 from datetime import datetime
 
-SAVE_FILE = "save.json"
+SAVE_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "save.json")
 
 # =========================
 # LOAD SAVE DATA