docs(ecosystem): Added Lunel in OpenCode Ecosystem Docs

[sohzm]

Issue for this PR

Closes #

Type of change

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

What does this PR do?

Im working on a foss app that lets you access your ai agents from your phone, it supports OpenCode so i added this in Opencode Ecosystem Docs

How did you verify your code works?

irrelevant

Screenshots / recordings

irrelevant

Checklist

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

[github-actions]

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What needs to be fixed:

• Not all checklist items are checked. Please confirm you have tested locally and have not included unrelated changes.

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[github-actions]

Hey! Your PR title Added Lunel in OpenCode Ecosystem Docs 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]

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