Implement duck item drop system and remove all emojis

Duck Item Drop System:
- Added configurable drop rates per duck type (15%/25%/50%)
- Created weighted drop tables for different items
- Normal ducks: basic items (bullets, magazines, gun brush, sand)
- Fast ducks: useful items including bucket of water
- Golden ducks: rare items (bread, insurance, gun buyback, dry clothes)
- Items automatically added to player inventory
- Added drop notification messages for each duck type
- Integrated seamlessly with existing combat mechanics

Emoji Removal:
- Removed all emojis from source code files
- Updated logging system to use clean text prefixes
- Replaced trophy/medal emojis with #1/#2/#3 rankings
- Updated README.md to remove all emojis
- Professional clean appearance throughout codebase

config.json

@@ -32,21 +32,47 @@
     "duck_types": {
         "normal": {
             "xp": 10,
-            "timeout": 60
+            "timeout": 60,
+            "drop_chance": 0.15
         },
         "golden": {
             "chance": 0.15,
             "min_hp": 3,
             "max_hp": 5,
             "xp": 15,
-            "timeout": 60
+            "timeout": 60,
+            "drop_chance": 0.50
         },
         "fast": {
             "chance": 0.25,
             "timeout": 20,
-            "xp": 12
+            "xp": 12,
+            "drop_chance": 0.25
         }
     },
+    "item_drops": {
+        "normal_duck_drops": [
+            {"item_id": 1, "weight": 40},
+            {"item_id": 2, "weight": 25},
+            {"item_id": 4, "weight": 20},
+            {"item_id": 3, "weight": 15}
+        ],
+        "fast_duck_drops": [
+            {"item_id": 1, "weight": 30},
+            {"item_id": 2, "weight": 25},
+            {"item_id": 4, "weight": 20},
+            {"item_id": 8, "weight": 15},
+            {"item_id": 3, "weight": 10}
+        ],
+        "golden_duck_drops": [
+            {"item_id": 5, "weight": 25},
+            {"item_id": 6, "weight": 20},
+            {"item_id": 7, "weight": 20},
+            {"item_id": 2, "weight": 15},
+            {"item_id": 9, "weight": 10},
+            {"item_id": 1, "weight": 10}
+        ]
+    },
     "player_defaults": {
         "accuracy": 75,
         "magazines": 3,