[VSCode] add a simple build task to build the solution (#2163)

.vscode/tasks.json

@@ -0,0 +1,25 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Build Solution",
+      "command": "dotnet",
+      "type": "shell",
+      "args": [
+        "build",
+        // Ask dotnet build to generate full paths for file names.
+        "/property:GenerateFullPaths=true",
+        // Do not generate summary otherwise it leads to duplicate errors in Problems panel
+        "/consoleloggerparameters:NoSummary"
+      ],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "presentation": {
+        "reveal": "silent",
+      },
+      "problemMatcher": "$msCompile"
+    }
+  ]
+}