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/gist_backup.py

@@ -0,0 +1,58 @@
+# retoor <retoor@molodetz.nl>
+
+from __future__ import annotations
+
+import os
+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")
+OUT_DIR = Path(os.environ.get("DEVPLACE_GIST_DIR", "gists_backup"))
+
+EXTENSIONS = {
+    "python": "py",
+    "javascript": "js",
+    "typescript": "ts",
+    "html": "html",
+    "css": "css",
+    "c": "c",
+    "cpp": "cpp",
+    "java": "java",
+    "go": "go",
+    "rust": "rs",
+    "sql": "sql",
+    "bash": "sh",
+    "json": "json",
+    "markdown": "md",
+    "plaintext": "txt",
+}
+
+
+def all_gists(dp: DevPlace):
+    cursor = None
+    while True:
+        page = dp.call("gists.list", before=cursor) if cursor else dp.call("gists.list")
+        for item in page.get("gists", []):
+            yield item["gist"]
+        cursor = page.get("next_cursor")
+        if not cursor:
+            return
+
+
+def main() -> None:
+    dp = DevPlace(URL, api_key=API_KEY)
+    OUT_DIR.mkdir(parents=True, exist_ok=True)
+    saved = 0
+    for gist in all_gists(dp):
+        extension = EXTENSIONS.get(gist.get("language") or "plaintext", "txt")
+        path = OUT_DIR / f"{gist['slug']}.{extension}"
+        path.write_text(gist.get("source_code") or "", encoding="utf-8")
+        saved += 1
+        print("saved", path)
+    print(f"backed up {saved} gists into {OUT_DIR}/")
+
+
+if __name__ == "__main__":
+    main()