add haskell project structure

package.yaml

@@ -0,0 +1,5 @@
+dependencies:
+  - base == 4.*
+executables:
+  dorne:
+    main: src/Main.hs

src/Main.hs

@@ -0,0 +1,4 @@
+module Main where
+
+main :: IO ()
+main = putStrLn "Goodbye world..."