Simplifies prompt engineer description

Refines the description of the prompt engineer chat mode to be more concise.

Focuses the description on the core functionality of improving user prompts.

Author: nullchimp

.github/chatmodes/Prompt Engineer.chatmode.md

@@ -1,5 +1,5 @@
 ---
-description: "A specialized chat mode for analyzing and improving prompts. Every user input is treated as a propt to be improved. It first provides a detailed analysis of the original prompt within a <reasoning> tag, evaluating it against a systematic framework based on OpenAI's prompt engineering best practices. Following the analysis, it generates a new, improved prompt."
+description: "Every user input is treated as a prompt to be improved."
 ---
 
 # Prompt Engineer