Base: Add a man-page for pwd(1)

Base/usr/share/man/man1/pwd.md

@@ -0,0 +1,13 @@
+## Name
+
+pwd - print name of working directory
+
+## Synopsis
+
+```**sh
+$ pwd
+```
+
+## Description
+
+`pwd` prints the absolute pathname of the current working directory.