docs(ecosystem): add opencode-plugin-goal-dsh

[V-dev-388]

Issue for this PR

Closes #

No existing issue. Adding my plugin to the ecosystem list, as invited by the note on the docs page ("Want to add your OpenCode related project to this list? Submit a PR.").

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Adds one row to the Plugins table in packages/web/src/content/docs/ecosystem.mdx for opencode-plugin-goal-dsh.

It's a /goal mode plugin ported from DeepSeek Harness's packages/goal/ (MIT; attribution noted in my README). Published on npm as opencode-plugin-goal-dsh, so users can enable it with "plugin": ["opencode-plugin-goal-dsh"].

How did you verify your code works?

Docs-only change. Rendered the table locally and confirmed the new row displays correctly. The plugin itself is on npm and tested against opencode 1.18.15.

Screenshots / recordings

Not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[Enough1122]

AI code review — automated review for reference; please use your judgment.

Link target verified live (repo returns HTTP 200), the row is placed in a sensible spot next to the sibling opencode-goal-plugin entry, and the description stays within the table's one-line convention. Table rendering in MDX is unaffected by the extra row.

• nit: packages/web/src/content/docs/ecosystem.mdx:57 — the new line exceeds the source-level pipe alignment used by neighboring rows; running the table through the repo's markdown formatter (or hand-padding) keeps diffs tidy for future edits.

No blocking issues found.

— automated review (ox-alpha, round2)