wip(phase15): AOT修正作業中 - Nyプラグインと標準ライブラリ実装

Phase 15のAOT/ネイティブビルド修正作業を継続中。
ChatGPTによるstd実装とプラグインシステムの改修を含む。

主な変更点：
- apps/std/: string.nyashとarray.nyashの標準ライブラリ追加
- apps/smokes/: stdライブラリのスモークテスト追加
- プラグインローダーv2の実装改修
- BoxCallのハンドル管理改善
- JIT hostcall registryの更新
- ビルドスクリプト（build_aot.sh, build_llvm.sh）の調整

まだ修正作業中のため、一部の機能は不完全な状態。

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

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

apps/smokes/std/array_len_min.nyash

@@ -0,0 +1,12 @@
+// Minimal reproduction for ArrayBox.length() fast-path
+static box Main {
+  main() {
+    local a
+    a = new ArrayBox()
+    // Expect: print 0, return 0
+    print(a.length())
+    if a.length() != 0 { return 1 }
+    return 0
+  }
+}
+

apps/smokes/std/array_smoke.nyash

@@ -0,0 +1,49 @@
+// std.array smoke: len/push/pop/slice
+static box Main {
+  main() {
+    local A
+    A = include "apps/std/array.nyash"
+    local fails
+    fails = 0
+
+    local a
+    a = new ArrayBox()
+    if A.array_len(a) != 0 { fails = fails + 1 }
+
+    // push
+    if A.array_push(a, 10) != 1 { fails = fails + 1 }
+    if A.array_push(a, 20) != 2 { fails = fails + 1 }
+    if A.array_len(a) != 2 { fails = fails + 1 }
+
+    // pop
+    local v
+    v = A.array_pop(a)
+    if v != 20 { fails = fails + 1 }
+    if A.array_len(a) != 1 { fails = fails + 1 }
+    // pop remaining and one extra -> null
+    v = A.array_pop(a)
+    if v != 10 { fails = fails + 1 }
+    v = A.array_pop(a)
+    if v != null { fails = fails + 1 }
+
+    // slice
+    A.array_push(a, 1)
+    A.array_push(a, 2)
+    A.array_push(a, 3)
+    local s
+    s = A.array_slice(a, 0, 2)
+    if s.length() != 2 { fails = fails + 1 }
+    if s.get(0) != 1 { fails = fails + 1 }
+    if s.get(1) != 2 { fails = fails + 1 }
+    // clamp
+    s = A.array_slice(a, -5, 99)
+    if s.length() != 3 { fails = fails + 1 }
+
+    if fails == 0 {
+      print("OK: array")
+      return 0
+    }
+    print("FAIL: array (" + fails.toString() + ")")
+    return 1
+  }
+}

apps/smokes/std/array_smoke_dbg.nyash

@@ -0,0 +1,43 @@
+static box Main {
+  main() {
+    local A
+    A = include "apps/std/array.nyash"
+    local fails
+    fails = 0
+
+    local a
+    a = new ArrayBox()
+    print("len0=" + A.array_len(a))
+
+    // push
+    print("push1->" + A.array_push(a, 10))
+    print("push2->" + A.array_push(a, 20))
+    print("len2=" + A.array_len(a))
+
+    // pop
+    local v
+    v = A.array_pop(a)
+    print("pop1=" + v)
+    print("len1=" + A.array_len(a))
+    // pop remaining and one extra -> null
+    v = A.array_pop(a)
+    print("pop2=" + v)
+    v = A.array_pop(a)
+    print("pop3=" + v)
+
+    // slice
+    A.array_push(a, 1)
+    A.array_push(a, 2)
+    A.array_push(a, 3)
+    local s
+    s = A.array_slice(a, 0, 2)
+    print("slice_len1=" + s.length())
+    print("s[0]=" + s.get(0))
+    print("s[1]=" + s.get(1))
+    // clamp
+    s = A.array_slice(a, -5, 99)
+    print("slice_len2=" + s.length())
+    return 0
+  }
+}
+

apps/smokes/std/string_smoke.nyash

@@ -0,0 +1,38 @@
+// std.string smoke: length/concat/slice/index_of/equals
+static box Main {
+  main() {
+    local S
+    S = include "apps/std/string.nyash"
+    local fails
+    fails = 0
+
+    // length
+    if S.string_length("abc") != 3 { fails = fails + 1 }
+    if S.string_length("") != 0 { fails = fails + 1 }
+
+    // concat
+    if S.string_concat("a", "b") != "ab" { fails = fails + 1 }
+    if S.string_concat("", "x") != "x" { fails = fails + 1 }
+
+    // slice (clamp + basic)
+    if S.string_slice("hello", 1, 4) != "ell" { fails = fails + 1 }
+    if S.string_slice("hi", -5, 5) != "hi" { fails = fails + 1 }
+    if S.string_slice("x", 0, 0) != "" { fails = fails + 1 }
+
+    // index_of
+    if S.string_index_of("banana", "na") != 2 { fails = fails + 1 }
+    if S.string_index_of("banana", "zz") != -1 { fails = fails + 1 }
+    if S.string_index_of("abc", "") != 0 { fails = fails + 1 }
+
+    // equals
+    if S.string_equals("a", "a") != 1 { fails = fails + 1 }
+    if S.string_equals("a", "b") != 0 { fails = fails + 1 }
+
+    if fails == 0 {
+      print("OK: string")
+      return 0
+    }
+    print("FAIL: string (" + fails.toString() + ")")
+    return 1
+  }
+}