docs: add wakatime plugin to ecosystem page (#5326)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

packages/web/src/content/docs/ecosystem.mdx

@@ -22,6 +22,7 @@ You can also check out [awesome-opencode](https://github.com/awesome-opencode/aw
 | [opencode-gemini-auth](https://github.com/jenslys/opencode-gemini-auth)                           | Use your existing Gemini plan instead of API billing          |
 | [opencode-antigravity-auth](https://github.com/NoeFabris/opencode-antigravity-auth)               | Use Antigravity's free models instead of API billing          |
 | [opencode-dynamic-context-pruning](https://github.com/Tarquinen/opencode-dynamic-context-pruning) | Optimize token usage by pruning obsolete tool outputs         |
+| [opencode-wakatime](https://github.com/angristan/opencode-wakatime)                              | Track OpenCode usage with Wakatime                            |
 
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