Document ESM UI providers

[ruibaby]

Summary

• Document ESM and IIFE output selection, shared runtime dependencies, lifecycle behavior, and packaging requirements for plugin UI providers.
• Add a guide for building theme UI providers with Vite or Rsbuild and include it in the theme documentation navigation.
• Document the stores.uiPlugins() API for querying plugin and theme provider registration status.
• Update related plugin structure, manifest, development, API request, and Halo 2.26 changelog documentation.

Related

• Support ESM UI plugins and themes halo#10213

Testing

• corepack pnpm@10.33.0 lint
• corepack pnpm@10.33.0 build
• git diff --check

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: ad36cbb181

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Install ui-shared before building the theme provider

For a new ui-plugin created by following this guide, both dependency commands install only the bundler and build tool, while the entry shown above directly imports @halo-dev/ui-shared. With pnpm's strict dependency resolution, that import is unavailable unless the project declares it directly, so either Vite or Rsbuild fails before producing dist; include a compatible @halo-dev/ui-shared dependency in both setup paths.

Useful? React with 👍 / 👎.