Renames phoron to plasma everywhere in the codebase and replaces sprites. (#3110)

Resources/Textures/Objects/Materials/materials.rsi/meta.json

@@ -58,6 +58,9 @@
         {
             "name": "tinbar_single"
         },
+        {
+            "name": "plasma_ore"
+        },
         {
             "name": "phoron_ore"
         },

Resources/Textures/Objects/Materials/sheets.rsi/meta.json

@@ -35,6 +35,12 @@
         {
             "name": "phoron"
         },
+        {
+            "name": "plasmaglass"
+        },
+        {
+            "name": "plasma"
+        },
         {
             "name": "metal"
         },