[poe2] Added MapTiers and GrantedSkillSocketNumbers (#128)

* [poe2] New stash tabs

Added new stash tabs:
* SocketableStashTabLayout
* RitualStashTabLayout
Changed BaseItemTypes key for consistency in:
* BlightCraftingItems (from Oil)
* QuestItems (from Item)

* [poe2] Added GrantedSkillSocketNumbers

* [por2] Added MapTiers

There is an additional integer

Author: Mefisto1029

dat-schema/poe2/GrantedSkillSocketNumbers.gql

@@ -0,0 +1,4 @@
+type GrantedSkillSocketNumbers {
+  Level: i32
+  Sockets: i32
+}

dat-schema/poe2/MapTiers.gql

@@ -0,0 +1,6 @@
+type MapTiers {
+  Tier: i32
+  Level: i32
+  Level2: i32
+  _: i32
+}