fix: correct pyproject.toml for project-scaffold-cli

- Fixed package name from auto-readme-cli to project-scaffold-cli
- Fixed dependencies to match project-scaffold-cli requirements
- Fixed linting import sorting issues in test files

project_scaffold_cli/templates/rust/src/main.rs.j2

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Welcome to {{ project_name }}!");
+}