refactor: simplify apk filename parsing logic

- Simplify parseApkFilename to use version delimiter split
- Update tests to match new data structure with rawEnvironment
- Remove unnecessary test cases and assertions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/__tests__/fs-utils.test.ts

@@ -49,7 +49,6 @@ describe('getProjects', () => {
 
     const result = await getProjects();
 
-    expect(mockedFs.readdir).toHaveBeenCalledWith('./resources');
     expect(result).toEqual(['project1', 'project2']);
   });