feat: enhance descriptions

Author: EmilySeville7cfg

schemas/completely.json

@@ -5,13 +5,13 @@
     "type": "object",
     "patternProperties": {
         ".": {
-            "title": "arguments",
-            "description": "Arguments of the current application",
+            "title": "completions",
+            "description": "Completions of the current command or sub-command",
             "type": "array",
             "minItems": 1,
             "uniqueItems": true,
             "items": {
-                "description": "An argument of the current application",
+                "description": "A completion of the current command or sub-command",
                 "type": "string",
                 "minLength": 1,
                 "examples": [