chore: sync README and install.sh from deepwork-frontend (d511c6bc9eea6ac92fafdb1e8a9e3f49b42e3abf)

Author: github-actions[bot]

README.md

@@ -59,3 +59,15 @@ Headless runner for automated pipelines (planned).
 3. Reports are written to `reports/` in your project directory
 4. The web UI watches for file changes and updates in real time
 
+## Demos
+
+End-to-end DeepWork demos live under `demos/`. Each demo is a
+self-contained `CONTENT_DIR` you can open with
+`CONTENT_DIR=demos/<name> make up` or by `cd`-ing into the folder and
+running the bundled CLI.
+
+- [`demos/oil/`](demos/oil/README.md) — predict summer 2026 WTI crude
+  oil prices by joining FRED price series, NOAA GHCN-Daily weather at
+  oil-region stations, and GDELT geopolitical events on
+  ISO-2 country code.
+