User should be able to create rule from pipeline details

## What?

When creating a pipeline, I have to jump through hoops to add a new rule to an existing pipeline. When looking at a pipeline:

A user is instructed to click "Edit" to add _existing_ rules to this pipeline. When starting a new pipeline, users will also want to add a new rule and attach it to this pipeline. There should be a new button that allows creating a rule + adding it to this pipeline in one go.

## Why?

## Your Environment

* Graylog Version:
* OpenSearch Version:
* MongoDB Version:
* Operating System:
* Browser version:

Start at the pipeline details view shown in the issue and trace the existing Edit action for attaching rules, then follow the current rule-creation flow. Done means the view offers an action that creates a new rule and attaches it to the current pipeline in one flow.

Written by the indexing model from the issue text.