Add Watch launch config

Author: Krzysztof-Cieslak

.gitignore

@@ -82,4 +82,5 @@ fsacpath.txt
 /out/
 
 build/bin
-build/obj
+build/obj
+release/fsharp.js.LICENSE.txt

.vscode/launch.json

@@ -37,6 +37,25 @@
 				"!**/node_modules/**"
 			],
 		},
+		{
+			"preLaunchTask": "Watch",
+			"name": "Build (watch) and Launch Extension",
+			"type": "extensionHost",
+			"runtimeExecutable": "${execPath}",
+			"args": [
+				"--extensionDevelopmentPath=${workspaceRoot}/release"
+			],
+			"stopOnEntry": false,
+			"request": "launch",
+			"sourceMaps": true,
+			"pauseForSourceMap": true,
+			"sourceMapRenames": true,
+			"trace": true,
+			"outFiles": [
+				"${workspaceFolder}/release/*.js",
+				"!**/node_modules/**"
+			],
+		},
 		{
 			"name": "Launch Only",
 			"type": "extensionHost",