Add vscode-languageserver-protocol as a dependency

[mikael-desharnais]

What it does

Fixes: #8030

The following pull-request adds the vscode-languageserver-protocol dependency to @theia/core since it is used by multiple extensions and is never added as a depependency.

How to test

• the build should successfully pass (no change in functionality)
• applications which have a subset of extensions will now work correctly

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

Signed-off-by: Mikael Desharnais mikael.desharnais@gmail.com

[vince-fugnitto]

The changes look good to me, I'll wait for CI to pass before merging.
I updated the pull-request description, as I mentioned before please keep it intact and fill out the necessary information for future contributions.

[akosyakov]

@vince-fugnitto I don't see any changes to yarn.lock. I don't think we need a CQ. It was just a missing declaration, dependency was already installed via other packages.

[vince-fugnitto]

@vince-fugnitto I don't see any changes to yarn.lock. I don't think we need a CQ. It was just a missing declaration, dependency was already installed via other packages.

Yes correct, it was initially added as a dep to @theia/metrics (the same version).
I was just waiting to merge in case others wanted a chance to review.