Add test for tsconfig with non-empty project name

Author: Hendrik van Antwerpen

languages/tree-sitter-stack-graphs-typescript/test/projects/import-with-own-project-baseurl.ts

@@ -0,0 +1,17 @@
+/* --- path: ./tsconfig.json --- */
+/* --- global: PROJECT_NAME=a --- */
+{
+    "compilerOptions": {
+        "composite": true,
+        "baseUrl": "./src/",
+    }
+}
+
+/* --- path: ./src/foo.ts --- */
+/* --- global: PROJECT_NAME=a --- */
+export const bar = 42;
+
+/* --- path: ./src/index.ts --- */
+/* --- global: PROJECT_NAME=a --- */
+import { bar } from "foo";
+//       ^ defined: 12