add NLDD dataset

NLDD/README.md

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+# NLDD (Natural Language Dataset for Dev)
+
+<p align="center">
+  <img src='./cover.png' width=800>
+</p>
+
+Welcome to NLDD (Natural Language Dataset for Dev), a large prompted dataset tailored for Natural Language to Software (NL2Software) research. This repository contains a rich collection of prompts organized into 5 major categories and further subdivided into 40 subcategories. In total, the dataset comprises 1200 high-quality prompt samples extracted from ChatGPT 3.5, specifically curated to facilitate research in NL2Software.
+
+## Structure
+- The generated prompt contains three parts:
+    -   Name of the software
+    -   Description of this software
+    -   Category of this software
+- Details
+	-	check.csv # Check Results
+	-	data_ChatDev_format.sh # Data, in the format of executable shell scripts (in ChatDev)
+	-	data_attribute_format.csv # Data, in the format of csv, containing three columns, Name/Description/Category
+## Category
+<p align="center">
+  <img src='./NLDD_Category.png' width=800>
+</p>