Added VSCode config

.gitignore

@@ -2,10 +2,13 @@
 dist/
 dist-newstyle/
 out/
+tmp/
+extra/
 
 .idea/
-.vscode/
 
 .DS_Store
 *.exe
 *.dll
+
+stack.yaml.lock

.vscode/tasks.json

@@ -0,0 +1,54 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Run (+ build)",
+            "type": "shell",
+            "command": "stack run",
+            "problemMatcher": [],
+            "dependsOn": [ "Build" ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "Build",
+            "type": "shell",
+            "command": "stack build",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": false
+            }
+        },
+        {
+            "label": "Test",
+            "type": "shell",
+            "command": "stack test",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        },
+        {
+            "label": "GHCI",
+            "type": "shell",
+            "command": "stack ghci ${input:file_to_load}",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        }
+    ],
+    "inputs": [
+        {
+            "id": "file_to_load",
+            "description": "CLI arguments specifying file to load into Stack GHCI",
+            "default": ".",
+            "type": "promptString"
+        },
+    ]
+}