development-monorepo-pnpm skill: initial import

Full-stack pnpm + Turborepo monorepo skill, independent of the separate
backend and frontend monorepo skills it draws on.

Repository shape is split four ways at the top level: applications-backend,
applications-frontend, packages-backend, packages-frontend — so a path
states which runtime a file ends up in.

Defaults: NestJS for backend services, React with IBM Carbon Design for
browser applications; the project's stated architecture overrides both.

Covers workspace globs, the Turborepo pipeline, filtered validation,
blast-radius checks, Module Federation, turbo prune image builds, and Helm.
Documents one sanctioned cross-boundary dependency: API contract types owned
by the backend, imported type-only by the frontend.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/example-shared-package/src/example-utils.ts

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+import type { ExampleItem, ExampleResult } from "./types.js";
+
+/**
+ * Wraps a value in an ExampleResult with an ISO timestamp.
+ */
+export const wrapResult = <T>(data: T): ExampleResult<T> => ({
+  data,
+  timestamp: new Date().toISOString(),
+});
+
+/**
+ * Finds an item by id from a list.
+ * Returns undefined when not found.
+ */
+export const findById = (
+  items: ExampleItem[],
+  id: string,
+): ExampleItem | undefined => items.find((item) => item.id === id);
+
+/**
+ * Converts an ExampleItem to a display string.
+ */
+export const toDisplayString = (item: ExampleItem): string =>
+  `[${item.id}] ${item.name}: ${item.value}`;

assets/example-shared-package/src/index.ts

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+export * from "./types.js";
+export * from "./example-utils.js";

assets/example-shared-package/src/types.ts

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+export type ExampleItem = {
+  id: string;
+  name: string;
+  value: string;
+};
+
+export type ExampleResult<T> = {
+  data: T;
+  timestamp: string;
+};