feat: Create a monoreopo for apollon2

[egenerse]

Issue: ls1intum/Apollon2#2

partially for:

• Library
• Server App
• Web App

Description

This pr is following of this commit
PR establishes a monorepo structure for Apollon, consolidating related projects into a single repository for better manageability and collaboration. The monorepo includes the following components:

• standalone/server: Backend services supporting Apollon.
• standalone/webapp: The Apollon standalone application.
• Library: The core Apollon library.

Changes Introduced

To implement the monorepo structure effectively, the following changes were made:

• Configured Prettier* to enforce consistent code format.
• Added Husky pre-commit hooks to automate linting and formatting checks.
• Defined commit message rules to maintain a clean and meaningful commit history (e.g., following conventional commits).

Project Organization:

• Structured the monorepo into the following folders:
  • standalone/: Contains the Server and Webapp.
  • library/: Contains the Apollon library.

Goals of the Monorepo

• Simplify dependency management and ensure consistency across projects.
• Provide a unified development environment to enhance collaboration and reduce duplication.
• Set a strong foundation for future scalability and maintainability of Apollon.

[kurunbelemir]

Can you update Readme according to changes and how to build and run? Thank you overall the structure looks good. @egenerse