skillcalculator: Add POH garden plants to farming calculator

* Differentiate big plant and small plant ferns
* Fix xp rate & icon for Fern (small plant)

runelite-client/src/main/resources/net/runelite/client/plugins/skillcalculator/skill_construction.json

@@ -39,7 +39,7 @@
     {
       "level": 1,
       "icon": 8186,
-      "name": "Fern",
+      "name": "Fern (big plant)",
       "xp": 31
     },
     {
@@ -128,7 +128,7 @@
     },
     {
       "level": 6,
-      "icon": 8187,
+      "icon": 8190,
       "name": "Large Leaf Bush",
       "xp": 70
     },
@@ -200,9 +200,9 @@
     },
     {
       "level": 12,
-      "icon": 8186,
+      "icon": 8182,
-      "name": "Fern",
+      "name": "Fern (small plant)",
-      "xp": 70
+      "xp": 100
     },
     {
       "level": 12,

runelite-client/src/main/resources/net/runelite/client/plugins/skillcalculator/skill_farming.json

@@ -6,6 +6,78 @@
     }
   ],
   "actions": [
+    {
+      "level": 1,
+      "icon": 8180,
+      "name": "Plant",
+      "xp": 31
+    },
+    {
+      "level": 1,
+      "icon": 8186,
+      "name": "Fern (big plant)",
+      "xp": 31
+    },
+    {
+      "level": 1,
+      "icon": 8189,
+      "name": "Short Plant",
+      "xp": 31
+    },
+    {
+      "level": 1,
+      "icon": 8183,
+      "name": "Dock Leaf",
+      "xp": 31
+    },
+    {
+      "level": 1,
+      "icon": 8181,
+      "name": "Small Fern",
+      "xp": 70
+    },
+    {
+      "level": 1,
+      "icon": 8184,
+      "name": "Thistle",
+      "xp": 70
+    },
+    {
+      "level": 1,
+      "icon": 8187,
+      "name": "Bush",
+      "xp": 70
+    },
+    {
+      "level": 1,
+      "icon": 8190,
+      "name": "Large Leaf Bush",
+      "xp": 70
+    },
+    {
+      "level": 1,
+      "icon": 8191,
+      "name": "Huge Plant",
+      "xp": 100
+    },
+    {
+      "level": 1,
+      "icon": 8188,
+      "name": "Tall Plant",
+      "xp": 100
+    },
+    {
+      "level": 1,
+      "icon": 8185,
+      "name": "Reeds",
+      "xp": 100
+    },
+    {
+      "level": 1,
+      "icon": 8182,
+      "name": "Fern (small plant)",
+      "xp": 100
+    },
     {
       "level": 1,
       "icon": 10847,