feat: comprehensive development progress

- Pattern matching implementation extended in match_expr.rs
- CLI configuration structured with categorized groups (task recommendation completed)
- Python LLVM builder split into function_lower.py (task recommendation completed)
- parse_box_declaration massive function refactored (task recommendation completed)
- Phase 16 Macro Revolution comprehensive planning and documentation
- Archive legacy phase documentation for clean structure
- HTTP message box improvements and performance optimizations
- MIR builder enhancements and control flow improvements

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/mir/optimizer.rs

@@ -8,7 +8,7 @@
  * - Dead code elimination
  */
 
-use super::{Effect, EffectMask, MirFunction, MirInstruction, MirModule, MirType, ValueId};
+use super::{MirFunction, MirInstruction, MirModule, MirType, ValueId};
 use crate::mir::optimizer_stats::OptimizationStats;
 // std::collections imports removed (local DCE/CSE impls deleted)
 
@@ -514,4 +514,3 @@ mod tests {
         );
     }
 }
-