Add Tab Functionality to the Plugins

[AaravMalani]

The issue underpinning the migration of host-side plugins to external plugins is a requirement to display tabs on the frontend. In fact, most visualization plugins (the CSE machine, the Stepper, the Data Viz, etc.) require custom tabs. To retain the modularity gains provided by plugins, this PR aims to add a standardized interface to register, display, hide and unregister tabs.

This PR,

• adds the @sourceacademy/common-tabs package, with the ITabService and Tab types
• edits the CI/CD workflow to successfully run tests and deploy external plugins
• transforms .cjs and .js external plugins to accept a custom require provider for the react, react/jsx-runtime, etc. packages.
• fixes the plugin directory to output an array instead of an object

Wiki Additions:

• add the caveat that external plugins must output their CommonJS output to the .js format
• an example of using the tab service

[changeset-bot]

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Latest commit: 3e097ba

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[gemini-code-assist]

Code Review

This pull request introduces a new @sourceacademy/common-tabs package to define tab-related interfaces, refactors the web test plugin to register a test tab, and updates the build script to wrap external plugins in a module wrapper. The review feedback highlights three key areas for improvement: initializing module.exports as an empty object with an exports reference in the build wrapper to prevent runtime errors in standard CommonJS modules, explicitly importing React in the new tabs package to avoid TypeScript compilation issues for consumers, and prefixing the unused conduit parameter with an underscore in the runner test plugin to prevent lint warnings.

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