Feat(gateway): Solace Consume plugin

[lena-larionova]

Description

Fixes #2622

Solace Consume plugin doc

• examples of all the modes
• Also including examples for SSL and URI capture from the original plugin
• Trying out adding a "use cases and examples" table that links to examples. It feels a bit weird because the descriptions for the modes are just duplicates of the "Implementation" section. Any thoughts?

Still need to test everything to make sure it works in this implementation.

Notes on includes:

• Removed the "implementation" include: the differences between the event plugins are too big and the include has become messy for such a short list of modes
• Added a WebSocket include + diagram: should be mostly the same between Kafka and Solace

Preview Links

https://deploy-preview-2768--kongdeveloper.netlify.app/plugins/solace-consume/unreleased/
https://deploy-preview-2768--kongdeveloper.netlify.app/plugins/solace-consume/examples/auto/unreleased
https://deploy-preview-2768--kongdeveloper.netlify.app/event-gateway/#protocol-mediation-plugins
Note that the event gateway index doesn't show this plugin because it's unreleased.

Changes from includes:
https://deploy-preview-2768--kongdeveloper.netlify.app/plugins/kafka-consume/
https://deploy-preview-2768--kongdeveloper.netlify.app/plugins/confluent-consume/

Checklist

• Tested how-to docs. If not, note why here. - to do
• All pages contain metadata.
• Any new docs link to existing docs.
• All autogenerated instructions render correctly (API, decK, Konnect, Kong Manager).
• Style guide (capitalized gateway entities, placeholder URLs) implemented correctly.
• Every page has a description entry in frontmatter.
• Add new pages to the product documentation index (if applicable).

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[cloudjumpercat]

Just had a few suggestions, so I'll approve this now! I tested all the examples and they all worked (with fake values, not real Solace values)

[bungle]

Just a note, this didn't fit into 3.12, but I am trying to automate this with:
https://github.com/Kong/kong-ee/pull/14004

But for now you need to setup them, most likely in plugin config itself, e.g. in:
config.session.properties map.