Datadog logs loader (#7356)

### Description
Created a Loader to get a list of specific logs from Datadog Logs.

### Dependencies
`datadog_api_client` is required.

### Twitter handle
[kzk_maeda](https://twitter.com/kzk_maeda)

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/extras/ecosystem/integrations/datadog_logs.mdx

@@ -0,0 +1,19 @@
+# Datadog Logs
+
+>[Datadog](https://www.datadoghq.com/) is a monitoring and analytics platform for cloud-scale applications.
+
+## Installation and Setup
+
+```bash
+pip install datadog_api_client
+```
+
+We must initialize the loader with the Datadog API key and APP key, and we need to set up the query to extract the desired logs.
+
+## Document Loader
+
+See a [usage example](/docs/modules/data_connection/document_loaders/integrations/datadog_logs.html).
+
+```python
+from langchain.document_loaders import DatadogLogsLoader
+```