Resubmission of #157532 with the following changes:
- Use `eslint-plugin-local` instead of `yarn` link to run our plugins
- Move our plugins to a top level `.eslintplugin` dir (as required by `eslint-plugin-local`)
- Update all names to `local/`
* Run our custom eslint rules using ts-node
Use `ts-node` to run our custom eslint rules. This lets us delete the pre-compiled js. It also means you can don't have to compile the rules while editing them
As part of this change, I've also switched us to using an eslint plugin instead of a rulesDir. This is now the preferred way to ship custom rules
* Fix two more disables
* Move ts-node to project root
* Enable transpileOnly
* Add support for TS's Hierarchical refactorings API
https://github.com/microsoft/TypeScript/pull/41975
* Add simple browser extension
This change adds a new 'simple browser' extension. This extension uses a webview to render webpages directly in VS Code. We plan on using it for optionally previewing local servers in both desktop and codespaces
The browser itself has a number of limitations due to the security around iframes:
- It traps keyboard focus
- We can't detect if a page fails to load
- We can't track the current url of the iframe
* Add experimental alert when the iframe is focused
* Disable events on focus warning
* Hooking up simple browser to opener
