Convert unicode escaped codes to glyphs

To normalize the content of the file with others in the project, that
hold unicode characters (nvim/init.vim, vim/vimrc,
vim/coc-settings.json, among them) converted all unicode escaped codes
in their glyph representation.  This change also brings more readability
to the file in the way that symbols represent more than code numbers.

nvim/coc-settings.json

@@ -1,32 +1,32 @@
 {
-	// Using manually patched NerdFonts with codeicon.ttf
+	// Using manually patched NerdFonts with codicon.ttf
 	// glyphs from https://code.visualstudio.com/api/references/icons-in-labels
 	"suggest.completionItemKindLabels": {
-		"function": "\uea8c",
-		"method": "\uf6a6",
-		"variable": "\uea88",
-		"constant": "\ueb5d",
-		"struct": "\uea91",
-		"class": "\ueb5b",
-		"interface": "\ueb61",
-		"text": "\uea93",
-		"enum": "\uea95",
-		"enumMember": "\ueb5e",
-		"module": "\uf668",
-		"color": "\ueb5c",
-		"property": "\ueb65",
-		"field": "\ueb5f",
-		"unit": "\uea96",
-		"file": "\uf471",
-		"value": "\uea95",
-		"event": "\uea86",
-		"folder": "\uf115",
-		"keyword": "\ueb62",
-		"snippet": "\ueb66",
-		"operator": "\ueb64",
-		"reference": "\uea94",
-		"typeParameter": "\uea92",
-		"default": "\ueb63"
+		"function": "",
+		"method": "",
+		"variable": "",
+		"constant": "",
+		"struct": "",
+		"class": "",
+		"interface": "",
+		"text": "",
+		"enum": "",
+		"enumMember": "",
+		"module": "",
+		"color": "",
+		"property": "",
+		"field": "",
+		"unit": "",
+		"file": "",
+		"value": "",
+		"event": "",
+		"folder": "",
+		"keyword": "",
+		"snippet": "",
+		"operator": "",
+		"reference": "",
+		"typeParameter": "",
+		"default": ""
 	},
 
 	// coc-python