🔌 Plugin: Cloudsmith

### 🔖 Summary

At DPG Media, we have created a plugin for Cloudsmith that adds a tab to entities, listing packages associated with the entity.

### 🌐 Project website (if applicable)

https://cloudsmith.com

### ✌️ Context

The tab appears on entities containing the `cloudsmith.com/packages` annotation, which is a comma-separated list of `/` slugs:

```yaml
metadata:
annotations:
cloudsmith.com/packages: dpg-npm/my-lib, dpg-docker/my-service
```

In the `app-config.yaml` file, the organisation and API key get defined:

```yaml
cloudsmith:
org: dpg-media
apiKey: ${CLOUDSMITH_PLUGIN_API_KEY}
```

The plugin exclusively supports the New Frontend System and is 100% Backstage UI.

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

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

### ✍️ Are you willing to maintain the plugin?

- [x] I understand the responsibilities as a [Plugin Maintainer Governance](https://github.com/backstage/community/blob/main/GOVERNANCE.md#plugin-maintainer) & will maintain the plugin

### 🏢 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?

Yes I am willing to submit a PR!

Start by reviewing the plugin requirements in this issue, the Cloudsmith project website, and the app-config.yaml example. Verify that entities annotated with cloudsmith.com/packages can display their associated packages and that the documented organisation and API key configuration works with the New Frontend System.

Written by the indexing model from the issue text.