Adding section to analysis utils package (#591)

* Adding section to analysis utils package

Author: ArturU043

docs/analysis_tools.md

@@ -0,0 +1,14 @@
+# Analysis utilities
+
+An additional package provides tools interacting with the ServiceX client: [ServiceX Analysis Utils](https://github.com/ssl-hep/ServiceX_analysis_utils). The Analysis Utils package offers helper functions that streamline the usage of ServiceX and simplify its integration on workflows. It also contains specific use case tools that take advantage from the ServiceX data extraction system.
+
+## Instalation
+
+The extra package can be installed with:
+
+```bash
+$ pip install servicex-analysis-utils
+```
+## Analysis utils documentation
+
+A documentation of the available tools with example usages can be found in [readthedocs](https://servicex-analysis-utils.readthedocs.io/en/latest/index.html#)

docs/index.rst

@@ -70,6 +70,7 @@ re-running queries that have already been executed.
    errors
    yaml
    command_line
+   analysis_tools
    contribute
    about
    modules