multi workspace support

[eriklieben]

Support multi workspaces in vs code

You can work with multiple project folders in Visual Studio Code with multi-root workspaces. This can be very helpful when you are working on several related projects at one time. For example, you might have a repository with a product's documentation which you like to keep current when you update the product source code.

more information for end users can be found here: https://code.visualstudio.com/docs/editor/multi-root-workspaces

more information on extension authoring can be found here:
https://github.com/Microsoft/vscode/wiki/Adopting-Multi-Root-Workspace-APIs

It would be nice if the Aurelia extension supports multiple workspaces by default.

This scenario can be either supported using a single language server or by using multiple language servers; one for each workspace (https://github.com/Microsoft/vscode/wiki/Adopting-Multi-Root-Workspace-APIs#single-language-server-or-server-per-folder).

It feels most logical to use one language server per workspace, so it's easier to keep the list of dependencies inside of a workspace/aurelia project separated. Otherwise, we might mix up different workspaces, and you don't want a suggestion based on different workspaces/ Aurelia2 projects. For example: get hints in workspace 1 about an Aurelia2 plugin you installed in workspace 2.

There is a sample code implementation for this, but it is using a deprecated property (params.rootUri). There is an open issue on the samples repo for this https://github.com/microsoft/vscode-extension-samples/issues/207 awaiting the response to that.

related to: #107

[eriklieben]

Sample repo with vs code workspaces for Aurelia2, Aurelia1, Angular, Vue, and React:
https://github.com/eriklieben/vscode-multi-workspace

When opening up the workspace, it should only activate the Aurelia2 plugin for the following workspaces:

• aurelia2-esnext-default
• aurelia2-typescript-default
• aurelia2-esnext-dumberjs-custom
• aurelia2-typescript-dumberjs-custom