Add GitHub authentication (#874)

Author: shati-patel

extensions/ql-vscode/package-lock.json

@@ -38,6 +38,7 @@
     "onView:codeQLAstViewer",
     "onView:test-explorer",
     "onCommand:codeQL.checkForUpdatesToCLI",
+    "onCommand:codeQL.authenticateToGitHub",
     "onCommand:codeQLDatabases.chooseDatabaseFolder",
     "onCommand:codeQLDatabases.chooseDatabaseArchive",
     "onCommand:codeQLDatabases.chooseDatabaseInternet",
@@ -236,6 +237,10 @@
       }
     },
     "commands": [
+      {
+        "command": "codeQL.authenticateToGitHub",
+        "title": "CodeQL: Authenticate to GitHub"
+      },
       {
         "command": "codeQL.runQuery",
         "title": "CodeQL: Run Query"
@@ -868,6 +873,7 @@
     "format-staged": "lint-staged"
   },
   "dependencies": {
+    "@octokit/rest": "^18.5.6",
     "child-process-promise": "^2.2.1",
     "classnames": "~2.2.6",
     "fs-extra": "^9.0.1",