Extensions Base

[Wouter01]

Description

This PR adds a start of the integration of ExtensionKit into the main app. It adds the following things:

• Extension discovery system
• Extension communication system
• Auto-activation for extensions
• A new Extensions window to manage extensions
• Navigator & Inspector extensions
• Output console for each extension (in status bar drawer)
• "Extensions" menubar menu
• Auto-reloading non-release extensions on change
• An improved SegmentedControlV2, which supports a wider range of use cases and works like Picker

Additionally, some changes were made to make things work:

• The inspector and sidebar tabs are now represented by enums instead of ints
• Dragging for these tabs is disabled for now
• Changes to the statusbar segmented control

See CodeEditApp/CodeEditKit#14 for CodeEditKit API

An example extension app (already compiled) and project can be found here:
ExampleExtension.zip

Note that the extension system is a WIP and is by no means done yet. Therefore, no docs will be added until the API gets stable. Limited docs are added to CodeEditKit's docC documentation to showcase how to create an extension.

Also note that a lot of these features aren't polished yet, but that isn't the goal of this PR. Instead, the goal is to have a base API and implementation that can be improved upon in the future.

Related Issues

• 👀 Extension Architecture / API #76
• ✨ Extensions Settings #375

Checklist

• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code

Screenshots

[0xWDG]

Heya,

Sorry for the slight delay, it's a big PR.

It looks good to me, there are some points i want to address:

• I suggested on some comments to add TODO: to make them more recognizable.
• I'm wondering about some commented out code, will this ever be used again, or are they obsolete
• 1 suggestion for an swiftlint:disable rule.

Great work!