[api-extractor] Fix ExportAnalyzer unable to resolve type import declaration with LiteralTypeNode argument

Author: Monkeylordz

apps/api-extractor/src/analyzer/ExportAnalyzer.ts

@@ -264,9 +264,12 @@ export class ExportAnalyzer {
     importOrExportDeclaration: ts.ImportDeclaration | ts.ExportDeclaration | ts.ImportTypeNode,
     moduleSpecifier: string
   ): boolean {
-    const specifier: ts.TypeNode | ts.Expression | undefined = ts.isImportTypeNode(importOrExportDeclaration)
+    let specifier: ts.TypeNode | ts.Expression | undefined = ts.isImportTypeNode(importOrExportDeclaration)
       ? importOrExportDeclaration.argument
       : importOrExportDeclaration.moduleSpecifier;
+    if (specifier && ts.isLiteralTypeNode(specifier)) {
+      specifier = specifier.literal;
+    }
     const mode: ts.ModuleKind.CommonJS | ts.ModuleKind.ESNext | undefined =
       specifier && ts.isStringLiteralLike(specifier)
         ? TypeScriptInternals.getModeForUsageLocation(

build-tests/api-extractor-scenarios/etc/bundlerModuleResolution/api-extractor-scenarios.api.md

@@ -4,8 +4,8 @@
 
 ```ts
 
-import { Foo } from './other';
-
+// Warning: (ae-forgotten-export) The symbol "Foo" needs to be exported by the entry point index.d.ts
+//
 // @public (undocumented)
 export const reexport: Foo;
 

build-tests/api-extractor-scenarios/etc/bundlerModuleResolution/rollup.d.ts

@@ -1,4 +1,5 @@
-import { Foo } from './other';
+declare class Foo {
+}
 
 /**
  * @public