scripts: add function hook_url in scripting API

src/plugins/python/weechat.pyi

@@ -1362,6 +1362,32 @@ def hook_process_hashtable(command: str, options: Dict[str, str], timeout: int,
     ...
 
 
+def hook_url(url: str, options: Dict[str, str], timeout: int, callback: str, callback_data: str) -> str:
+    """`hook_url in WeeChat plugin API reference <https://weechat.org/doc/weechat/api/#_hook_url>`_
+    ::
+
+        # example
+        def my_url_cb(data: str, url: str, options: Dict[str, str], output: Dict[str, str]) -> int:
+            weechat.prnt("", "output: %s" % output)
+            return weechat.WEECHAT_RC_OK
+
+        # example 1: output to a file
+        hook1 = weechat.hook_url("https://weechat.org/",
+                                 {"file_out": "/tmp/weechat.org.html"},
+                                 20000, "my_url_cb", "")
+
+        # example 2: custom HTTP headers, output sent to callback
+        options = {
+            "httpheader": "\n".join([
+                "Header1: value1",
+                "Header2: value2",
+            ]),
+        }
+        hook2 = weechat.hook_url("http://localhost:8080/", options, 20000, "my_url_cb", "")
+    """
+    ...
+
+
 def hook_connect(proxy: str, address: str, port: int, ipv6: int, retry: int, local_hostname: str,
                  callback: str, callback_data: str) -> str:
     """`hook_connect in WeeChat plugin API reference <https://weechat.org/doc/weechat/api/#_hook_connect>`_