fix(53289): TypeScript cannot auto-complete keyword typeof (#53325)

Author: a-tarasyuk

src/harness/fourslashInterfaceImpl.ts

@@ -1100,6 +1100,7 @@ export namespace Completion {
         "string",
         "symbol",
         "true",
+        "typeof",
         "undefined",
         "unique",
         "unknown",

src/services/utilities.ts

@@ -2318,6 +2318,7 @@ export const typeKeywords: readonly SyntaxKind[] = [
     SyntaxKind.ReadonlyKeyword,
     SyntaxKind.StringKeyword,
     SyntaxKind.SymbolKeyword,
+    SyntaxKind.TypeOfKeyword,
     SyntaxKind.TrueKeyword,
     SyntaxKind.VoidKeyword,
     SyntaxKind.UndefinedKeyword,

tests/cases/fourslash/typeOfKeywordCompletion.ts

@@ -0,0 +1,8 @@
+/// <reference path="fourslash.ts" />
+
+////export type A = typ/**/
+
+verify.completions({
+    marker: "",
+    includes: [{ name: "typeof", sortText: completion.SortText.GlobalsOrKeywords }]
+});