v1.2.0: Import Compliance, Error Hierarchy, Examples

What's New

Breaking Changes

None - fully backward compatible.

New Features

• Custom Error Hierarchy: Added CodeforcesPyError base exception and APIError for API failures
• Examples Directory: Added sync_example.py and async_example.py with working code

Improvements

• Import Compliance: All imports now use import X style (no from X import Y)
• README Rewrite: Clean, concise documentation with correct API usage
• License Fix: Corrected license classifier to GPL-3.0

Technical

• All code passes pyright with 0 errors, 0 warnings, 0 informations
• All code passes ruff check with no issues