Spawn vscode-microprofile extension out of vscode-quarkus

[fbricon]

See redhat-developer/quarkus-ls#268

Question : where should the new extension live?

[angelozerr]

I suggest that you see my PR for vscode-xml java extension https://github.com/redhat-developer/vscode-xml/pull/193/files

[angelozerr]

Remove all features managed by https://github.com/redhat-developer/vscode-microprofile (like all LSP features) and extend the vscode-microprofile with Quarkus support:

• with Quarkus JDT
• for Quarkus LS

by registering the proper JAR with package.json

It should be nice to update README and CONTRIBUTING to explain that vscode-quarkus is based on vscode-microprofile

[fbricon]

The vscode-microprofile extension lives at https://github.com/redhat-developer/vscode-microprofile