Refactor BatteryModel and market handling for improved time tracking, logging, and market rate calculations

Something is slow, I suspect its the logging, but time is tight, so I'm going to wrap up to make it at least useable

tests/test_battery.py

@@ -1,5 +1,8 @@
+import datetime
+import copy
 from batterymodel import BatteryModel
 from batterymodel.models.battery import BatteryState
+from batterymodel.models.market import MarketDataIncrement
 
 
 def test_battery_stats():
@@ -20,3 +23,24 @@ def test_battery_update():
 
 def test_market_decision_idle():
     battery = BatteryModel()
+    battery._current_charge=100000
+    time_increment = datetime.timedelta(minutes=30)
+    market_increment = MarketDataIncrement(
+        datetime.datetime.strptime('01-01-2022 00:00', '%d-%m-%Y %H:%M'),
+        [
+            (datetime.datetime.strptime('01-01-2022 00:00', '%d-%m-%Y %H:%M'),43.0),
+            (datetime.datetime.strptime('01-01-2022 00:00', '%d-%m-%Y %H:%M'),14.0)
+        ]
+    )
+
+    market_increment_current = MarketDataIncrement(
+        datetime.datetime.strptime('01-01-2022 00:30', '%d-%m-%Y %H:%M'),
+        [
+            (datetime.datetime.strptime('01-01-2022 00:00', '%d-%m-%Y %H:%M'),43.0),
+            (datetime.datetime.strptime('01-01-2022 00:30', '%d-%m-%Y %H:%M'),13.0)
+        ]
+    )
+    current_battery = copy.deepcopy(battery)
+    battery.market_decision(time_increment, current_battery, market_increment_current)
+    assert current_battery._battery_state == BatteryState.IDLE
+    assert battery._battery_state == BatteryState.DISCHARGING