Add inline-image style for BPMN icon images

[mesellings]

Description

Closes #4629.

This is a quick fix that applies an inline style to these BPMN icon images to at least make them smaller and remove borders, padding, and so on.

However, some of these icons already have vertical spacing within the SVG, and we shouldn't changes these icons without understanding the impact on wherever else these are used in the docs. As a result, the gateway icon does not 'sit' on the baseline.

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[github-actions]

👋 🤖 🤔 Hello, @mesellings! Did you make your changes in all the right places?

These files were changed only in docs/. You might want to duplicate these changes in versioned_docs/version-8.6/.

• docs/components/best-practices/modeling/creating-readable-process-models.md

You may have done this intentionally, but we wanted to point it out in case you didn't. You can read more about the versioning within our docs in our documentation guidelines.

[akeller]

The BPMN diagrams from BPMN.io and the icons don't seem to want to load at all in the preview environment, so I'll pull this down and run it locally.

Related, the BPMN diagrams from BPMN.io load slow on production.

[akeller]

Looks good when running locally! Thank you!

BTW, I saw you removed "like" from the sentence. I think this is trying to communicate that it's an example gateway symbol as there are multiple.

[mesellings]

Hi @camunda/tech-writers please can I get an approval as Amara is away this week? I just added the word "such as" back in after prior approval.

[conceptualshark]

No idea why these don't build in the preview, but the images do look great locally -thanks for this fix!

[github-actions]

🧹 Preview environment for this PR has been torn down.