docs(opentelemetry-ingest): add Syslog testing instructions with RFC5424 curl example

OpenTelemetryIngest/Docs/SysLog/README.md

@@ -0,0 +1,16 @@
+# Syslog Testing Instructions
+
+Test in terminal, send a sample RFC5424 payload:
+   ```bash
+   curl -X POST \
+     -H "Content-Type: text/plain" \
+       -H "x-oneuptime-token: YOUR_TEST_TOKEN" \
+       -H "x-oneuptime-service-name: local-syslog" \
+     --data '<134>1 2024-07-10T17:25:43.123Z host app 1234 ID47 [exampleSDID@32473 iut="3" eventSource="App"] An application event log entry' \
+     https://oneuptime.com/syslog/v1/logs
+   ```
+
+Replace `YOUR_TEST_TOKEN` and `local-syslog` with a valid telemetry key and desired service label. Please also replace oneuptime.com with your host if you're testing this locally.
+
+Inspect the service logs or connected queue to ensure the message is accepted and parsed.
+