docs: refresh advanced api overview (#4366)

Author: ScriptedAlchemy

advanced-api/README.md

@@ -1,8 +1,27 @@
 # Advanced API
 
-This leverages pre-release implementations of Webpack 5 Module Federation's new advanced API
+Examples in this directory showcase early implementations of advanced Module Federation features. Each subfolder is a standalone example with its own documentation.
 
-There are several configurations in here
+## Available examples
 
-- Dynamic Remotes
-  - The ability to dynamically load and share code between remotes that are unknown to the host at build time.
+- [Automatic Vendor Sharing](./automatic-vendor-sharing/README.md) – automatically detect and share common dependencies across federated builds.
+- [Dynamic Remotes](./dynamic-remotes/README.md) – dynamically load and share code from remotes that aren't known to the host at build time.
+- [Dynamic Remotes with Runtime Environment Variables](./dynamic-remotes-runtime-environment-variables/README.md) – configure remote URLs via runtime-provided environment variables and container-friendly setups.
+- [Dynamic Remotes with Synchronous Imports](./dynamic-remotes-synchronous-imports/README.md) – change remote URLs at runtime while keeping static import syntax like `import Widget from 'app2/Widget'`.
+
+## Getting started
+
+Install dependencies at the repository root:
+
+```bash
+pnpm install
+```
+
+Then run or build any example from its folder, e.g.:
+
+```bash
+pnpm --filter automatic-vendor-sharing_* start
+pnpm --filter dynamic-remotes_* build
+```
+
+See each example's README for detailed instructions.