Peak Stamina

Added a new set of attributes to control stamina costs for specific actions independently.

• peakstamina:jump_cost_multiplier
• peakstamina:sprint_cost_multiplier
• peakstamina:attack_cost_multiplier
• peakstamina:block_break_cost_multiplier
• peakstamina:swim_cost_multiplier
• peakstamina:climb_cost_multiplier
• peakstamina:regen_delay_multiplier
• peakstamina:exhaustion_duration_multiplier
• peakstamina:weight_calculation_multiplier

The stamina calculation logic now checks these specific attributes before applying the cost.

The formula is: TotalCost = BaseCost * GlobalUsageMultiplier * SpecificActionMultiplier. Updated /stamina attr command to support the new action multipliers (e.g., /stamina attr cost_jump 0.5 to halve jump costs).