📝 docs(README): update README with new usage examples

[blackms]

• refresh badges and update library description
• provide detailed quick start and feature usage sections
• include datacenter locations and advanced usage tips

🔧 chore(gitignore): update .gitignore for new project structure

• remove unnecessary entries
• add new directories and files to ignore list

✅ test(examples): add example scripts for VM operations

• add create_vm.py and list_vms.py for creating and listing VMs
• demonstrate usage of pyarubacloud library in example scripts

✨ feat(init): introduce new pyarubacloud package structure

• implement core modules for client, api, models, and utilities
• support comprehensive operations on ArubaCloud resources

♻️ refactor(compat): provide backward compatibility layer

• implement legacy compatibility for older pyArubaCloud API
• ensure existing code continues to work with the new implementation

📦 build(setup): update setup.py for new package version and dependencies

• update package name to lowercase pyarubacloud
• bump version to 1.0.0 and revise dependencies and classifiers

✅ test(client): add unit tests for client module

• test client initialization and authentication
• ensure datacenter setting and cache clearing are tested

✅ test(compat): add unit tests for compatibility layer

• test legacy cloud interface and load balancer classes
• verify backward compatibility with existing functionality