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

src/utils.py

@@ -36,7 +36,7 @@ class MessageManager:
             "duck_spawn": [
                 "・゜゜・。。・゜゜\\_o< QUACK! A duck has appeared! Type !bang to shoot it!",
                 "・゜゜・。。・゜゜\\_o< *flap flap* A wild duck landed! Use !bang to hunt it!",
-                "🦆 A duck swoops into view! Quick, type !bang before it escapes!",
+                "A duck swoops into view! Quick, type !bang before it escapes!",
                 "・゜゜・。。・゜゜\\_o< Quack quack! Fresh duck spotted! !bang to bag it!",
                 "*rustling* A duck waddles out from the bushes! Fire with !bang!",
                 "・゜゜・。。・゜゜\\_o< Splash! A duck surfaces! Shoot it with !bang!"