Training Tools first release

First release of Training Tools includes:
User Management: Register, log in, and manage user profiles.
Friends Management: Add, invite, and manage friends.
Exercise Tracking: Add and compare exercise results with friends.
Training Plans: Create and share training plans.
Admin Controls: Manage exercises, muscle groups, and user roles.
OAuth 2.0: Sign in with Google.
Open API: Integrate with other applications using the provided API.
API Documentation: Available via Swagger at /api-docs.