Add an overview page for the Solace Consume policy

Migrate or rewrite the Solace Consume AI Gateway Policy page (`app/_ai_gateway_policies/solace-consume/index.md`) to include the overview content from the corresponding plugin page: https://developer.konghq.com/plugins/solace-consume/

Start with app/_ai_gateway_policies/solace-consume/index.md and compare it with the overview content at https://developer.konghq.com/plugins/solace-consume/. Migrate or rewrite the page so it includes the corresponding overview content, then verify the rendered page contains the expected overview and follows the surrounding policy-page structure.

Written by the indexing model from the issue text.