Dev/foundation

[Wouter01]

Description

This PR adds a base API for integrating extensions with CodeEdit. It offers the following:

• API to create a running extension
• API to create settings
• API to create sidebars
• some other APIs that aren't working yet
• testing for LSP integration
• limited docC docs

It also adds Swiftlint to this package.

See CodeEditApp/CodeEdit#1274 for CodeEditKit integration in CodeEdit

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.

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.

Example API:

@mainfinalclassSidebarExtensionExample:CodeEditExtension{vardescription:String=""varentitlements:[Entitlement]=[]}extensionSidebarExtensionExample:SettingsExtension{varsettings:someView{Toggle("Toggle 1", isOn:.constant(true))Toggle("Toggle 2", isOn:.constant(false))}}extensionSidebarExtensionExample:SidebarExtension{varsidebars:someSidebar{Inspector(id:"umbrellaInspector"){Form{Text("Hello, world!")Button("Print"){NSLog("Print")}Button("Warning"){Logger(subsystem:"DummyExt", category:"").warning("Warning")}Button("Info"){Logger(subsystem:"DummyExt", category:"").info("Info")}Button("Fault"){Logger(subsystem:"DummyExt", category:"").fault("Fault")}}.formStyle(.grouped)}.help("Umbrella Inspector").icon("umbrella")Navigator(id:"carrotNavigator"){Form{Text("Hello, world!")}.formStyle(.grouped)}.help("Carrot Navigator").icon("carrot")}}

Related Issues

• 👀 Extension Architecture / API CodeEdit#76

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