docs: Rebrand OptimizR to Optimiz-rs throughout documentation

Updated Branding in ReadTheDocs:
- ✅ All 'OptimizR' → 'Optimiz-rs' (17 files)
- ✅ Project name in conf.py
- ✅ HTML title and short title
- ✅ All algorithm documentation
- ✅ Getting started guide
- ✅ Installation guide
- ✅ Theory/mathematical foundations
- ✅ Archive documentation

Documentation now consistently uses the new 'optimiz-rs' branding that
matches both PyPI and crates.io package names.

Note: Python module name 'optimizr' in import statements intentionally
unchanged (that's the actual module name).

docs/archive/COMPLETION_SUMMARY.md

@@ -1,4 +1,4 @@
-# OptimizR Refactoring - Completion Report
+# Optimiz-rs Refactoring - Completion Report
 
 ## ✅ All Tasks Completed
 
@@ -263,7 +263,7 @@ pyproject.toml                 # ✅ Unchanged
 
 ✅ **All todo items completed successfully!**
 
-The OptimizR codebase has been completely refactored with:
+The Optimiz-rs codebase has been completely refactored with:
 - ✅ Modular trait-based architecture
 - ✅ Functional programming patterns
 - ✅ Advanced design patterns (Strategy, Builder, Traits)