Scoreboard mod updates

• Added class system with three options: minerador (miner), guerreiro (warrior) and arqueiro (archer). Use /classe <nome> to pick; choices persist between restarts.
• Miners gain one bonus drop when breaking resource blocks (ore/gem/crystal tagged or harvest drops with similar ids); the extra item is added directly to the inventory.
• Warriors deal 25% extra damage when using swords or blades and take 20% less incoming damage from any source.
• Archers deal 35% more damage with projectiles shot by the player.
• Players see a join hint reminding them to choose a class.

Known notes:

• Bonus mining drop relies on block and drop ids containing ore/gem/crystal/ingot; some custom resources may not trigger the bonus.