refactor: Rename PyPI package from optimizr-rs to optimiz-rs

- Shorter, cleaner package name
- Updated pyproject.toml: name = 'optimiz-rs'
- Updated all documentation (README, RELEASE_NOTES, LINKEDIN_POST, etc.)
- Rebuilt wheel: optimiz_rs-1.0.0-cp38-abi3-macosx_10_12_x86_64.whl
- Tested: Python import and DE algorithm working correctly

Package verified and ready for PyPI publication.

LINKEDIN_POST.md

@@ -31,7 +31,7 @@ OptimizR brings blazing-fast implementations of advanced algorithms to data scie
 
 Python:
 ```bash
-pip install optimizr-rs
+pip install optimiz-rs
 ```
 
 Rust:
@@ -64,5 +64,5 @@ I'd love your feedback, contributions, and star on GitHub! ⭐
 
 🔗 GitHub: https://github.com/ThotDjehuty/optimiz-r
 📚 Docs: https://optimiz-r.readthedocs.io
-📦 PyPI: https://pypi.org/project/optimizr-rs/ (publishing soon)
+📦 PyPI: https://pypi.org/project/optimiz-rs/
 📦 crates.io: https://crates.io/crates/optimizr