Contribute problem matcher (#24114)

Resolves: #3828
Breaking #23953 down into
two PR
1. problem matcher --> make sure to cover case where there is invalid
strings printed before the Error (e.g. NameError or ValueError)
2. Whether we will replace 'Run In Terminal by contributing task with
the problem matcher attached.

---------

Co-authored-by: Karthik Nadig <kanadig@microsoft.com>

package.json

@@ -80,6 +80,30 @@
     "browser": "./dist/extension.browser.js",
     "l10n": "./l10n",
     "contributes": {
+        "problemMatchers":
+        [
+            {
+                "name": "python",
+                "owner": "python",
+                "source": "python",
+                "fileLocation": "autoDetect",
+                "pattern": [
+                    {
+                        "regexp": "^.*File \\\"([^\\\"]|.*)\\\", line (\\d+).*",
+                        "file": 1,
+                        "line": 2
+                    },
+                    {
+                        "regexp": "^\\s*(.*)\\s*$"
+
+                    },
+                    {
+                        "regexp": "^\\s*(.*Error.*)$",
+                        "message": 1
+                    }
+                ]
+            }
+        ],
         "walkthroughs": [
             {
                 "id": "pythonWelcome",