List all skills

Returns all skills/professions with translated names, the XP required per level (experience_per_level), the XP granted per action (xp_rewards: harvestables/mobs/blocks/entities), and the default craft XP per recipe ingredient count (craft_experience, keyed 1..7). Action rewards scale linearly from from (level 1) to to (at to_level), flat when to == from. Craft XP scales from start down to end at max_level; a recipe may override it on /recipes, otherwise effective = recipe.experience ?? craft_experience[len(ingredients)].