add chrome configuration for debugging

.vscode/launch.json

 {
    "version": "0.2.0",
    "configurations": [
-   {
+      {
+         "name": "Launch Chrome",
+         "request": "launch",
+         "type": "chrome",
+         "pathMapping": {
+            "/tt-rss/": "${workspaceFolder}"
+         },
+         "urlFilter": "*/tt-rss/*",
+         "runtimeExecutable": "chrome.exe",
+      },
+      {
       "name": "Listen for XDebug",
       "type": "php",
       "request": "launch",