fix: normalize project names by stripping trailing slashes in crew creation

- Strip trailing slashes from project names in create_folder_structure
- Add comprehensive tests for trailing slash scenarios
- Fixes #3059

The issue occurred because trailing slashes in project names like 'hello/'
were directly incorporated into pyproject.toml, creating invalid package
names and script entries. This fix silently normalizes project names by
stripping trailing slashes before processing, maintaining backward
compatibility while fixing the invalid template generation.

Co-Authored-By: João <joao@crewai.com>

src/crewai/cli/create_crew.py

@@ -14,6 +14,7 @@ from crewai.cli.utils import copy_template, load_env_vars, write_env_file
 
 
 def create_folder_structure(name, parent_folder=None):
+    name = name.rstrip('/')
     folder_name = name.replace(" ", "_").replace("-", "_").lower()
     class_name = name.replace("_", " ").replace("-", " ").title().replace(" ", "")