quests: add some more loot tables, rewrite intro questline a bit to guilde a newbie through to starting on the elements

config/ftbquests/quests/reward_tables/minor_grist_essence.snbt

@@ -0,0 +1,8 @@
+{
+	id: "0863E4D3BFE0E7E8"
+	loot_size: 1
+	order_index: 2
+	rewards: [{ item: "kubejs:grist_essence", random_bonus: 8 }]
+	title: "Minor Grist Essence"
+	use_title: true
+}