docs: add opencode-mystatus to plugins

[javazys]

Added section for opencode-mystatus with details about AI subscription quotas.

Submission Type

• Plugin
• Project
• Theme
• Agent
• Resource

Details

Name: opencode-mystatus
Repository: https://github.com/vbgate/opencode-mystatus
Description: Check all your AI subscription quotas in one command. Supports OpenAI (Plus/Pro/Codex, etc.), Zhipu AI, Google Antigravity, and more.

Checklist

• Relevant to OpenCode
• Repository is public and accessible
• Actively maintained
• Not a duplicate
• Entry added in alphabetical order

Entry Format

Use this format in the appropriate README section:

<details>
  <summary><b>Name</b> <img src="https://badgen.net/github/stars/owner/repo" height="14"/> - <i>Short description</i></summary>
  <blockquote>
    Full description.
    <br><br>
    <a href="https://github.com/owner/repo">🔗 <b>View Repository</b></a>
  </blockquote>
</details>

See contributing.md for full instructions.