Add initial implementation of backtesting framework with CLI interface. Introduce core modules for data loading, trade management, performance metrics, and logging. Include Supertrend indicator calculations and slippage estimation. Update .gitignore to exclude logs and CSV files.

.vscode/launch.json

@@ -1,16 +1,22 @@
 {
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
-
-        {
-            "name": "Python Debugger: main.py",
-            "type": "debugpy",
-            "request": "launch",
-            "program": "main.py",
-            "console": "integratedTerminal"
-        }
+      {
+        "name": "Python Debugger: cli.py",
+        "type": "debugpy",
+        "request": "launch",
+        "program": "${workspaceFolder}/cli.py",
+        "console": "integratedTerminal",
+        "cwd": "${workspaceFolder}",
+        "args": [
+          "2025-03-01", "2025-09-22",
+          "--timeframes-minutes", "60", "240", "480",
+          "--stop-loss", "0.02", "0.05",
+          "--exit-on-bearish-flip",
+          "--csv", "../data/btcusd_1-min_data.csv"
+        ],
+        "env": { "PYTHONPATH": "${workspaceFolder}" }
+      }
     ]
-}
+  }
+