test: VS Code上で複数のjestテストを表示できるように (#16251)

.vscode/settings.json

@@ -6,8 +6,12 @@
 	"files.associations": {
 		"*.test.ts": "typescript"
 	},
-	"jest.jestCommandLine": "pnpm run jest",
 	"jest.runMode": "on-demand",
+	"jest.virtualFolders": [
+		{ "name": "backend unit", "jestCommandLine": "pnpm -F backend run test" },
+		{ "name": "backend e2e", "jestCommandLine": "pnpm -F backend run test:e2e"},
+		{ "name": "misskey-js", "jestCommandLine": "pnpm -F misskey-js run jest" }
+	],
 	"editor.codeActionsOnSave": {
 		"source.fixAll": "explicit"
 	},