Improves structure and hopefully automated patching of symbol only nerd font variations

* relates to issues #479 #668

bin/scripts/lib/fonts-small-subset.json

@@ -32,6 +32,14 @@
       "linkPreviewFont": "hack",
       "description": "dotted zero, short descenders, expands upon work done for Bitstream Vera & DejaVu, legible at common sizes"
     },
+    {
+      "unpatchedName": "JetBrainsMono",
+      "patchedName": "JetBrainsMono",
+      "folderName": "JetBrainsMono",
+      "imagePreviewFont": "JetBrainsMono Nerd Font",
+      "linkPreviewFont": "jetbrainsmono",
+      "description": "JetBrains officially created font for developers"
+    },
     {
       "unpatchedName": "ShareTechMono",
       "patchedName": "ShureTechMono",
@@ -39,6 +47,22 @@
       "imagePreviewFont": "ShureTechMono Nerd Font",
       "linkPreviewFont": "share-tech",
       "description": "dotted zeros, distinguishable 1 and l, curved and straight character lines"
+    },
+    {
+      "unpatchedName": "Symbols Template 1000 EM",
+      "patchedName": "Symbols-1000-em Nerd Font Complete",
+      "folderName": "NerdFontsSymbolsOnly",
+      "imagePreviewFont": "Symbols Nerd Font",
+      "linkPreviewFont": false,
+      "description": "Just the Nerd Font Icons. I.e Symbol font only. 1000 EM size"
+    },
+    {
+      "unpatchedName": "Symbols Template 2048 EM",
+      "patchedName": "Symbols-2048-em Nerd Font Complete",
+      "folderName": "NerdFontsSymbolsOnly",
+      "imagePreviewFont": "Symbols Nerd Font",
+      "linkPreviewFont": false,
+      "description": "Just the Nerd Font Icons. I.e Symbol font only. 2048 EM size"
     }
   ]
 }

bin/scripts/lib/fonts.json

@@ -360,6 +360,22 @@
       "linkPreviewFont": "space",
       "description": "Squarish character lines, dotted zero, aggressive parethesis"
     },
+    {
+      "unpatchedName": "Symbols Template 1000 EM",
+      "patchedName": "Symbols-1000-em Nerd Font Complete",
+      "folderName": "NerdFontsSymbolsOnly",
+      "imagePreviewFont": "Symbols Nerd Font",
+      "linkPreviewFont": false,
+      "description": "Just the Nerd Font Icons. I.e Symbol font only. 1000 EM size"
+    },
+    {
+      "unpatchedName": "Symbols Template 2048 EM",
+      "patchedName": "Symbols-2048-em Nerd Font Complete",
+      "folderName": "NerdFontsSymbolsOnly",
+      "imagePreviewFont": "Symbols Nerd Font",
+      "linkPreviewFont": false,
+      "description": "Just the Nerd Font Icons. I.e Symbol font only. 2048 EM size"
+    },
     {
       "unpatchedName": "Terminus",
       "patchedName": "Terminess",