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/REFACTORING.md

@@ -1,8 +1,8 @@
-# OptimizR Refactoring Summary
+# Optimiz-rs Refactoring Summary
 
 ## Overview
 
-This document summarizes the major refactoring applied to OptimizR to improve modularity, introduce functional programming patterns, implement design patterns, and add concurrency support.
+This document summarizes the major refactoring applied to Optimiz-rs to improve modularity, introduce functional programming patterns, implement design patterns, and add concurrency support.
 
 ## Architecture Changes
 
@@ -369,7 +369,7 @@ impl ProposalStrategy for MyProposal {
 
 ## Conclusion
 
-This refactoring significantly improves OptimizR's:
+This refactoring significantly improves Optimiz-rs's:
 - **Modularity**: Clear trait boundaries, easy to extend
 - **Maintainability**: Builder patterns, functional utilities reduce boilerplate
 - **Performance**: Parallel execution, memoization, lazy evaluation