feat(joinir): Phase 213-2 Step 2-2 & 2-3 Data structure extensions

Extended PatternPipelineContext and CarrierUpdateInfo for Pattern 3 AST-based generalization.

Changes:
1. PatternPipelineContext:
   - Added loop_condition: Option<ASTNode>
   - Added loop_body: Option<Vec<ASTNode>>
   - Added loop_update_summary: Option<LoopUpdateSummary>
   - Updated build_pattern_context() for Pattern 3

2. CarrierUpdateInfo:
   - Added then_expr: Option<ASTNode>
   - Added else_expr: Option<ASTNode>
   - Updated analyze_loop_updates() with None defaults

Status: Phase 213-2 Steps 2-2 & 2-3 complete
Next: Create Pattern3IfAnalyzer to extract if statement and populate update summary

docs/guides/wasm-guide/planning/compatibility_matrix.md

@@ -104,7 +104,7 @@ cargo update
 cargo build --release
 
 # WASM/AOT テスト
-./target/release/nyash --aot test_simple.hako
+./target/release/hakorune --aot test_simple.hako
 wasmtime --allow-precompiled test_simple.cwasm
 ```
 
@@ -170,7 +170,7 @@ config.cranelift_opt_level(OptLevel::Speed)?;
 ### 技術指標
 ```bash
 # ✅ 成功条件
-./target/release/nyash --aot test.hako      # コンパイル成功
+./target/release/hakorune --aot test.hako      # コンパイル成功
 wasmtime --allow-precompiled test.cwasm      # 実行成功
 echo $?                                      # 0 (正常終了)
 ```