Backend/Armory: convert response fields to snake_case (PEP8 compliance

Frontend/Armory: correct item tooltip class requirement line to match ingame logic

Frontend/Race: fix male undead icon name

Frontend/Class: fix death knight class icon name typo

Frontend/Leaderboards: add armory hyperlink to character name

Frontend/Leaderboards: add default fallback specialization icon

Backend/Leaderboards: convert response fields to snake_case (PEP8 compliance)

Backend/Armory: add spell description token resolution for item tooltips

Frontend/Armory: add skills and stats components, update character section bg, add more character stats and placeholder values in case stat is not available

Backend/Armory: add character professions, average item level, secondary skills and some missing stats to API response

Frontend/Armory: add faction icon next to player name

Frontend/Armory: fix death knight case name coloring typo

Backend/Tools: update tools to use relative URLs instead of localhost

Frontend/Chat: render HTML links in chat messages as clickable hyperlinks

Backend/Tools: fix hyperlink opening in a new tab