refactor: group project/ui components into subdirectories

src/entities/project/index.ts

@@ -1,3 +1 @@
-export { DetailedProjectCard } from './ui/DetailedProjectCard';
-export { ProjectCard } from './ui/ProjectCard';
-export { ProjectMetadata } from './ui/ProjectMetadata';
+export { DetailedProjectCard, ProjectCard, ProjectMetadata } from './ui';