Adds tasks for web extensions

.vscode/tasks.json

@@ -41,6 +41,43 @@
 			},
 			"problemMatcher": "$tsc"
 		},
+		{
+			"type": "npm",
+			"script": "watch-webd",
+			"label": "Build Web Extensions",
+			"group": "build",
+			"isBackground": true,
+			"presentation": {
+				"reveal": "never"
+			},
+			"problemMatcher": {
+				"owner": "typescript",
+				"applyTo": "closedDocuments",
+				"fileLocation": [
+					"absolute"
+				],
+				"pattern": {
+					"regexp": "Error: ([^(]+)\\((\\d+|\\d+,\\d+|\\d+,\\d+,\\d+,\\d+)\\): (.*)$",
+					"file": 1,
+					"location": 2,
+					"message": 3
+				},
+				"background": {
+					"beginsPattern": "Starting compilation",
+					"endsPattern": "Finished compilation"
+				}
+			}
+		},
+		{
+			"type": "npm",
+			"script": "kill-watch-webd",
+			"label": "Kill Build Web Extensions",
+			"group": "build",
+			"presentation": {
+				"reveal": "never",
+			},
+			"problemMatcher": "$tsc"
+		},
 		{
 			"label": "Run tests",
 			"type": "shell",