[FEATURE]: Add opencode-docker to ecosystem documentations

Feature hasn't been suggested before.

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Describe the enhancement you want to request

What

Add opencode-docker to the Projects table on the Ecosystem page, and to the 17 translated copies of that page so the description reads correctly in each language.

The project is a security-hardened Docker container for running the OpenCode CLI in isolation: read-only root filesystem, dropped capabilities, no privilege escalation, and API keys loaded from files rather than the command line.

Why

The ecosystem page is where people browse community tooling, and this is the kind of thing that's easy to miss if it's not listed. Running OpenCode in a locked-down container is a genuinely useful setup for people who don't want an AI coding agent to have full access to their shell.

What it touches

• packages/web/src/content/docs/ecosystem.mdx
• The same file under each of the ja, zh-cn, bs, ar, ru, pl, da, nb, th, de, zh-tw, pt-br, es, ko, fr, tr, and it locale directories