🌏 i18n: Improve clarity of English translation (#3154)

* 🌏 i18n: Improve clarity of English translation

* 🔧 fix(useCategories): replace i18n string to `com_ui_select_a_category`

* 🔨 refactor: avoid using placeholder strings where possible

This commit simplifies the internationalization approach for English language strings by removing the placeholder ones where they are used only once. This makes proper localization possible for Russian language, and possibly others.

Also renamed `com_ui_text_prompt` to `com_ui_prompt_text` to match the alphabetical order.

* 🎨 style(CreatePromptForm): add missing margin-top to the submit button

client/src/components/Prompts/Groups/List.tsx

@@ -34,7 +34,7 @@ export default function List({
             className="mx-2 w-full px-3"
             onClick={() => navigate('/d/prompts/new')}
           >
-            + {localize('com_ui_create_var', localize('com_ui_prompt'))}
+            + {localize('com_ui_create_prompt')}
           </Button>
         </div>
       )}