[FEATURE]: Add opencode-decision-mode to the community plugin list #57388

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

The opencode-decision-mode plugin allows OpenCode users to delegate bulk yes/no, choice, and score-based judgments directly on their project data to a decision model (such as Jev), which is a much more cost-efficient alternative to using a standard generative chat model for these types of tasks.

Since this plugin is now publicly available, listing it in the community ecosystem docs will make it discoverable for other OpenCode users looking for this functionality.