docs(ecosystem): add opencode-session-id-plugin

[hardes11]

Issue for this PR

Closes #37676

Type of change

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

What does this PR do?

Adds opencode-session-id-plugin to the ecosystem docs plugin list in packages/web/src/content/docs/ecosystem.mdx.

opencode-session-id-plugin is a TUI plugin that displays the session ID beneath the title in the OpenCode sidebar — restored for stable-channel users, since upstream only shows this line on dev/edge builds (gated behind InstallationChannel !== "latest"). The sidebar_title slot is an intentional extension point, so this is a legitimate use of the plugin surface rather than a patch over upstream behavior.

Project links:

• GitHub: https://github.com/hardes11/opencode-session-id-plugin
• npm: https://www.npmjs.com/package/opencode-session-id-plugin

How did you verify your code works?

• Confirmed the docs entry was appended to the Plugins table in packages/web/src/content/docs/ecosystem.mdx (last row, after opencode-goal-plugin, matching the append-as-added ordering convention of the existing 37 entries)
• Verified the row's pipe positions column-align with all 37 existing rows (hand-padded to the table's max cell widths: Name=98, Description=98)
• Confirmed this PR only adds the new ecosystem entry with no unrelated changes

Screenshots / recordings

N/A (docs-only change)

Checklist

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

[github-actions]

Hey! Your PR title add opencode-session-id-plugin to ecosystem doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[hardes11]

Updated the title to conventional-commit format (docs(ecosystem):) and linked the companion issue #37676 via Closes #37676 in the PR description.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍