[docs] moved into folders

docs/dev/docs.dev.md

@@ -0,0 +1,20 @@
+---
+{
+	"_label": "Developer",
+	"_toc": [
+		"docs.dev.install",
+		"docs.dev.quickstart",
+		"docs.dev.framework",
+		"docs.dev.modules",
+		"docs.dev.client_script",
+		"docs.dev.api",
+		"docs.dev.translate",
+		"docs.dev.docs"
+	]
+}
+---
+### Is this for me?
+
+To starting hacking into ERPNext, you must have some understanding of how a dynamic web application works. There are hundreds of architectures and frameworks to make web development easier, but at the core there are a few elements that are important to understand.
+
+ERPNext is built on `wnframework` which is primarily developed for ERPNext but can be extended to make similar database driven applications. wnframework uses Python on the server-side and has a javascript based client for entering data, managing workflow and making reports.