🚀 jenkins: Action Examples

### Workspace

jenkins

### 🔖 Feature description

It would be great to have examples added to this plugin so that way they show up in the [installed actions](https://demo.backstage.io/create/actions) making it easier for people to self service this actions.

### 🎤 Context

It would be great to have examples added to this plugin so that way they show up in the [installed actions](https://demo.backstage.io/create/actions) making it easier for people to self service this actions.

### ✌️ Possible Implementation

Add examples using the examples feature, examples of how to do this can be found here: https://github.com/backstage/community-plugins/blob/302611256ef16b3fbcaace16767f44931231cc30/workspaces/azure-devops/plugins/scaffolder-backend-module-azure-devops/src/actions/devopsRunPipeline.examples.ts#L20-L37 and here: https://github.com/backstage/community-plugins/blob/302611256ef16b3fbcaace16767f44931231cc30/workspaces/azure-devops/plugins/scaffolder-backend-module-azure-devops/src/actions/devopsRunPipeline.ts#L59

### 👀 Have you spent some time to check if this feature request has been raised before?

- [x] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [x] I have read the [Code of Conduct](https://github.com/backstage/community-plugins/blob/main/CODE_OF_CONDUCT.md)

### Are you willing to submit PR?

No, but I'm happy to collaborate on a PR with someone else

Start by inspecting the Jenkins plugin's installed actions and compare their structure with devopsRunPipeline.examples.ts and devopsRunPipeline.ts, especially the examples registration shown in the linked lines. Add representative examples using that pattern, then verify they appear in the installed actions view at the linked Backstage demo.

Written by the indexing model from the issue text.