Check if token has been revoked and offer user to reauthenticate

Problem

When the user authenticates using OAuth and the token is revoked, the extension starts failing to load project data without a clear user message. The error is only logged

2023-12-14T20:42:23:653 [error]: Error performing token check
    Unauthorized
    Error: Unauthorized
        at #n (/Users/tomas/.vscode-insiders/extensions/gitlab.gitlab-workflow-3.93.1/assets/language-server/node/main-bundle.js:117:1177)
        at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
        at async PB.checkToken (/Users/tomas/.vscode-insiders/extensions/gitlab.gitlab-workflow-3.93.1/assets/language-server/node/main-bundle.js:117:1354)
        at async JE.didChangeConfigurationHandler (/Users/tomas/.vscode-insiders/extensions/gitlab.gitlab-workflow-3.93.1/assets/language-server/node/main-bundle.js:123:1431)
2023-12-14T20:42:23:653 [warning]: Token is invalid. Failed to check token: Error: Unauthorized. Reason: unknown

Solution

detect revoked token and offer user to re-authenticate