Bundle brainstorm server dependencies instead of requiring npm install

Vendor node_modules into the repo so the brainstorm server works
immediately on fresh plugin installs without needing npm at runtime.

skills/brainstorming/scripts/node_modules/math-intrinsics/.eslintrc

@@ -0,0 +1,16 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"rules": {
+		"eqeqeq": ["error", "allow-null"],
+		"id-length": "off",
+		"new-cap": ["error", {
+			"capIsNewExceptions": [
+				"RequireObjectCoercible",
+				"ToObject",
+			],
+		}],
+	},
+}