docs:(ecosystem) Add opencode-chat-channel to ecosystem documentation

[coneycode]

Issue for this PR

• add a plugin named opencode-chat-channel to ecosystem documentation; the plugin could connect instant messaging bots like feishu/lark;
  Closes docs:(ecosystem) Add opencode-chat-channel to ecosystem documentation #16388

Type of change

• Documentation

What does this PR do?

• just add a plugin named opencode-chat-channel to docs;

How did you verify your code works?

• no code added;

Screenshots / recordings

• none;

Checklist

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

[github-actions]

Hey! Your PR title Add opencode-chat-channel to ecosystem documentation 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.

[github-actions]

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

[github-actions]

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