Add YAML validation task for VSCode

Author: botder

.vscode/tasks.json

@@ -0,0 +1,27 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Validate YAML",
+            "type": "shell",
+            "windows": {
+                "command": "${workspaceFolder}/tools/validate.cmd"
+            },
+            "linux": {
+                "command": "${workspaceFolder}/tools/validate.sh"
+            },
+            "problemMatcher": {
+                "owner": "yaml",
+                "fileLocation": "absolute",
+                "source": "validate",
+                "pattern": {
+                    "regexp": "^((?:.+).yaml): (?:fail|error): (.+)$",
+                    "file": 1,
+                    "message": 2
+                }
+            }
+        }
+    ]
+}