fix: rename oh-my-opencode rule to oh-my-openagent

[ndizazzo]

Summary

• Rename rules/oh-my-opencode.yaml -> rules/oh-my-openagent.yaml
• Update tool id, label, source paths, and target filename to oh-my-openagent
• Update README example and CHANGELOG reference
• Bump version to 0.9.3

Type of change

• Bug fix
• New feature
• Refactor / cleanup
• Documentation
• Other:

Testing

• pnpm test passes (0 failures)
• pnpm run lint:agents outputs agent-lint: ok
• New tests added for new behaviour (if applicable)

Checklist

• No "use strict" omitted from new .js files
• No empty catch {} blocks introduced
• No new runtime dependencies added without discussion
• CHANGELOG.md updated (for user-visible changes)

[Copilot]

Pull request overview

This PR renames the bundled rule for the “oh-my-*” OpenCode config from oh-my-opencode to oh-my-openagent, updates references across tests/docs/changelog, and bumps the package version to 0.9.3.

Changes:

• Rename rules/oh-my-opencode.yaml → rules/oh-my-openagent.yaml and update tool id/label/paths/targets accordingly.
• Update unit tests and README references to the new rule name.
• Update CHANGELOG.md and bump package.json version to 0.9.3.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/install-core.test.js	Updates rule fixture expectations and profile discovery assertions to oh-my-openagent naming.
rules/oh-my-opencode.yaml	Removes the old bundled rule file.
rules/oh-my-openagent.yaml	Adds the renamed bundled rule with updated tool id/paths/targets.
README.md	Updates selection-mode example text and YAML snippet to reference oh-my-openagent.
package.json	Version bump to 0.9.3 and adds keyword for oh-my-openagent.
CHANGELOG.md	Adds 0.9.3 entry for rename and updates a prior entry reference.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.