⚡ Add autocompletion for i18n keys in script sections of Vue files (#3133)

* 📘 Type `baseText()` to i18n keys

* 📘 Adjust `baseText()` signature

* 👕 Except JSON files from Vue ESLint

* 🐛 Fix errors surfaced by `baseText()` typing

* ⚡ Pluralize keys

* 📘 Add typing for category names

* ⚡ Mark internal keys

* ✏️ Update docs references

* 🎨 Prettify syntax

* 🐛 Fix leftover internal key references

packages/editor-ui/tslint.json

@@ -2,7 +2,8 @@
 	"linterOptions": {
 		"exclude": [
 			"node_modules/**/*",
-			"../../node_modules/**/*"
+			"../../node_modules/**/*",
+			"**/*.json"
 		]
 	},
 	"defaultSeverity": "error",