Implement magazine system and inventory management

- Add level-based magazine system (3 mags at L1, 2 at L3-5, 1 at L6-8)
- Replace ammo/chargers with current_ammo/magazines/bullets_per_magazine
- Add inventory system for storing and using shop items
- Add Magazine item to shop (15 XP, adds 1 magazine)
- Auto-migrate existing players from old ammo system
- Auto-update magazines when players level up
- Fix method name bugs (get_player_level -> calculate_player_level)

messages.json

@@ -1,30 +1,32 @@
 {
   "duck_spawn": [
     "・゜゜・。。・゜゜\\_O< {bold}QUACK!{reset}",
-    "・゜゜・。。・゜゜\\_O> {yellow}*flap flap*"
+    "・゜゜・。。・゜゜\\_o< {light_grey}quack~{reset}",
+    "・゜゜・。。・゜゜\\_O> {bold}*flap flap*{reset}"
   ],
-  "duck_flies_away": "The {cyan}duck{reset} flies away. ·°'`'°-.,¸¸.·°'`",
-  "bang_hit": "{nick} > {red}*BANG*{reset} You shot the {cyan}duck{reset}! [{green}+{xp_gained} xp{reset}] [Total ducks: {blue}{ducks_shot}{reset}]",
+  "duck_flies_away": "The {bold}duck{reset} flies away. ·°'`'°-.,¸¸.·°'`",
+  "bang_hit": "{nick} > {green}*BANG*{reset} You shot the duck! [{green}+{xp_gained} xp{reset}] [Total ducks: {bold}{ducks_shot}{reset}]",
   "bang_miss": "{nick} > {red}*BANG*{reset} You missed the {cyan}duck{reset}!",
   "bang_no_duck": "{nick} > {red}*BANG*{reset} What did you shoot at? There is {red}no duck{reset} in the area... [{red}GUN CONFISCATED{reset}]",
   "bang_no_ammo": "{nick} > {orange}*click*{reset} You're out of ammo! Use {blue}!reload{reset}",
   "bang_not_armed": "{nick} > You are {red}not armed{reset}.",
-  "bef_success": "{nick} > {green}*befriend*{reset} You befriended the {cyan}duck{reset}! [{green}+{xp_gained} xp{reset}] [Ducks befriended: {pink}{ducks_befriended}{reset}]",
+  "bef_success": "{nick} > {orange}*befriend*{reset} You befriended the duck! [{green}+{xp_gained} xp{reset}] [Ducks befriended: {bold}{ducks_befriended}{reset}]",
   "bef_failed": "{nick} > {pink}*gentle approach*{reset} The {cyan}duck{reset} doesn't trust you and {yellow}flies away{reset}...",
   "bef_no_duck": "{nick} > {pink}*gentle approach*{reset} There is {red}no duck{reset} to befriend in the area...",
   "bef_duck_shot": "{nick} > {pink}*gentle approach*{reset} The {cyan}duck{reset} is {red}already dead{reset}! You can't befriend it now...",
-  "reload_success": "{nick} > {orange}*click*{reset} Reloaded! [Ammo: {green}{ammo}{reset}/{green}{max_ammo}{reset}] [Chargers: {blue}{chargers}{reset}]",
+  "reload_success": "{nick} > {orange}*click*{reset} New magazine loaded! [Ammo: {green}{ammo}{reset}/{green}{max_ammo}{reset}] [Spare magazines: {blue}{chargers}{reset}]",
   "reload_already_loaded": "{nick} > Your gun is {green}already loaded{reset}!",
-  "reload_no_chargers": "{nick} > You're out of {red}chargers{reset}!",
+  "reload_no_chargers": "{nick} > You're out of {red}spare magazines{reset}!",
   "reload_not_armed": "{nick} > You are {red}not armed{reset}.",
   "shop_display": "DuckHunt Shop: {items} | You have {green}{xp} XP{reset}",
   "shop_item_format": "({blue}{id}{reset}) {cyan}{name}{reset} - {green}{price} XP{reset}",
   "help_header": "{blue}DuckHunt Commands:{reset}",
-  "help_user_commands": "{blue}!bang{reset} - Shoot at ducks | {blue}!bef{reset} - Befriend ducks | {blue}!reload{reset} - Reload your gun | {blue}!shop{reset} - View the shop",
+  "help_user_commands": "{blue}!bang{reset} - Shoot at ducks | {blue}!bef{reset} - Befriend ducks | {blue}!reload{reset} - Reload your gun | {blue}!shop{reset} - View/buy from shop | {blue}!duckstats{reset} - View your stats and items | {blue}!use{reset} - Use inventory items",
   "help_help_command": "{blue}!duckhelp{reset} - Show this help",
-  "help_admin_commands": "{red}Admin:{reset} {blue}!rearm <player>{reset} | {blue}!disarm <player>{reset} | {blue}!ignore <player>{reset} | {blue}!unignore <player>{reset} | {blue}!ducklaunch{reset} | {blue}!reloadshop{reset}",
+  "help_admin_commands": "{red}Admin:{reset} {blue}!rearm <player>{reset} | {blue}!disarm <player>{reset} | {blue}!ignore <player>{reset} | {blue}!unignore <player>{reset} | {blue}!ducklaunch{reset}",
   "admin_rearm_player": "[{red}ADMIN{reset}] {cyan}{target}{reset} has been rearmed by {blue}{admin}{reset}",
   "admin_rearm_all": "[{red}ADMIN{reset}] All players have been rearmed by {blue}{admin}{reset}",
+  "admin_rearm_self": "[{red}ADMIN{reset}] {blue}{admin}{reset} has rearmed themselves",
   "admin_disarm": "[{red}ADMIN{reset}] {cyan}{target}{reset} has been disarmed by {blue}{admin}{reset}",
   "admin_ignore": "[{red}ADMIN{reset}] {cyan}{target}{reset} is now ignored by {blue}{admin}{reset}",
   "admin_unignore": "[{red}ADMIN{reset}] {cyan}{target}{reset} is no longer ignored by {blue}{admin}{reset}",