feat: add plug-and-play devRant API client examples with Python and JavaScript

Add complete set of example scripts for the devRant REST protocol under
examples/devrant/, including reusable client libraries, a rant poster,
a live feed watcher with keyword-based auto-upvote, and an end-to-end
smoke test that exercises every endpoint. Both Python (stdlib-only) and
JavaScript (Node 18+ global fetch) implementations are provided.

examples/xmlrpc/export_data.py

@@ -0,0 +1,39 @@
+# retoor <retoor@molodetz.nl>
+
+from __future__ import annotations
+
+import json
+import os
+import sys
+from pathlib import Path
+
+from client import DevPlace
+
+URL = os.environ.get("DEVPLACE_URL", "https://devplace.net")
+API_KEY = os.environ.get("DEVPLACE_API_KEY", "YOUR_API_KEY")
+USERNAME = os.environ.get("DEVPLACE_USERNAME") or (sys.argv[1] if len(sys.argv) > 1 else "")
+OUT_FILE = Path(os.environ.get("DEVPLACE_EXPORT_FILE", "devplace_export.json"))
+
+
+def main() -> None:
+    if not USERNAME:
+        print("Usage: DEVPLACE_USERNAME=<you> python export_data.py")
+        return
+    dp = DevPlace(URL, api_key=API_KEY)
+    export = {
+        "profile": dp.call("profile.detail", username=USERNAME),
+        "posts": dp.call("profile.detail", username=USERNAME, tab="posts").get("posts", []),
+        "gists": dp.call("profile.detail", username=USERNAME, tab="gists").get("gists", []),
+        "projects": dp.call("profile.detail", username=USERNAME, tab="projects").get("projects", []),
+        "bookmarks": dp.call("bookmarks.saved").get("items", []),
+        "notifications": dp.call("notifications.list").get("notification_groups", []),
+    }
+    OUT_FILE.write_text(json.dumps(export, indent=2), encoding="utf-8")
+    print(
+        f"exported profile, {len(export['posts'])} posts, {len(export['gists'])} gists, "
+        f"{len(export['projects'])} projects to {OUT_FILE}"
+    )
+
+
+if __name__ == "__main__":
+    main()