Reorganize templates into dir structure matching 'dotnet new' templates

templates/Microsoft.DotNet.Web.Spa.ProjectTemplates/Content/react/tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "target": "es5",
+    "jsx": "react",
+    "sourceMap": true,
+    "skipDefaultLibCheck": true,
+    "strict": true,
+    "types": ["webpack-env"]
+  },
+  "exclude": [
+      "bin",
+      "node_modules"
+  ]
+}