feat(sub-lang): Integrate SUB Language (.sb) native kernel modules and in-kernel VM/interpreter

- Add native .sb kernel modules in sub/ (signature.sb, power_governor.sb, benchmark.sb, easter_egg.sb)
- Implement in-kernel SUB Language VM and AST interpreter in kernel/sub/sub_vm.c
- Implement C-interop runtime in kernel/sub/sub_runtime.c and include/kernel/sub_lang.h
- Initialize SUB Language Engine in boot sequence step [8/14] in kernel/main.c
- Implement strtol in lib/string.c
- Add LazyBox applets: 'subinfo', 'subi', 'subpower', 'subbench', and 'subquote'

sub/benchmark.sb

@@ -0,0 +1,36 @@
+// Integer Matrix & Recursive Algorithm Benchmark
+// Written in SUB Language (.sb) - Simple Universal Builder
+
+function sub_fib(n) {
+    if n <= 1 {
+        return n
+    }
+    return sub_fib(n - 1) + sub_fib(n - 2)
+}
+
+function sub_matrix_multiply_test(dim) {
+    var total = 0
+    var i = 0
+    while i < dim {
+        var j = 0
+        while j < dim {
+            var k = 0
+            while k < dim {
+                total = total + (i * dim + k) * (k * dim + j)
+                k = k + 1
+            }
+            j = j + 1
+        }
+        i = i + 1
+    }
+    return total
+}
+
+function run_sub_lang_benchmark(iterations) {
+    var score = 0
+    var fib_result = sub_fib(15) // 610
+    var mat_result = sub_matrix_multiply_test(8)
+
+    score = fib_result + (mat_result % 1000) + (iterations * 10)
+    return score
+}

sub/easter_egg.sb

@@ -0,0 +1,18 @@
+// Interactive Easter Eggs & SUB Kernel Quotes
+// Written in SUB Language (.sb) - Simple Universal Builder
+
+function get_easter_egg(idx) {
+    if idx == 0 {
+        return "SUB-OS: Where C, Assembly, Rust, and SUB-Lang converge."
+    }
+    if idx == 1 {
+        return "Simple Universal Builder: One language to build them all."
+    }
+    if idx == 2 {
+        return "Born from bare-metal, forged in code."
+    }
+    if idx == 3 {
+        return "Memory safety with Rust, native power with C, custom signature with SUB-Lang!"
+    }
+    return "Antigravity + Subhobhai = Infinite Operating System Possibilities."
+}

sub/power_governor.sb

@@ -0,0 +1,64 @@
+// CPU Power Governor & Thermal Scaling Engine
+// Written in SUB Language (.sb) - Simple Universal Builder
+
+function calc_pstate(temp_celsius, cpu_load_pct) {
+    // P0: Maximum Performance (Turbo Frequency)
+    // P1: High Performance
+    // P2: Balanced Efficiency
+    // P3: Low Power Throttle
+    // P4: Emergency Thermal Cooldown
+
+    if temp_celsius >= 90 {
+        return 4 // P4: Emergency throttle
+    }
+    if temp_celsius >= 75 {
+        if cpu_load_pct > 80 {
+            return 2 // P2: Balanced
+        } else {
+            return 3 // P3: Thermal throttle
+        }
+    }
+    if temp_celsius >= 60 {
+        if cpu_load_pct > 60 {
+            return 1 // P1: High Performance
+        } else {
+            return 2 // P2: Balanced
+        }
+    }
+    if cpu_load_pct >= 40 {
+        return 0 // P0: Turbo Performance
+    }
+    return 1 // P1: Standard Idle/Low-load
+}
+
+function get_pstate_target_freq_mhz(pstate) {
+    if pstate == 0 {
+        return 3800 // 3.8 GHz Turbo
+    }
+    if pstate == 1 {
+        return 3200 // 3.2 GHz High
+    }
+    if pstate == 2 {
+        return 2400 // 2.4 GHz Balanced
+    }
+    if pstate == 3 {
+        return 1600 // 1.6 GHz Low
+    }
+    return 800 // 800 MHz Emergency Throttle
+}
+
+function get_pstate_voltage_mv(pstate) {
+    if pstate == 0 {
+        return 1250 // 1.25V
+    }
+    if pstate == 1 {
+        return 1150 // 1.15V
+    }
+    if pstate == 2 {
+        return 1050 // 1.05V
+    }
+    if pstate == 3 {
+        return 950  // 0.95V
+    }
+    return 850  // 0.85V
+}

sub/signature.sb

@@ -0,0 +1,23 @@
+// SUB-OS Kernel Signature & Identity Module
+// Written in SUB Language (.sb) - Simple Universal Builder
+
+function get_os_signature() {
+    return "SUB-OS Modular Monolithic Kernel (Engineered with C, Assembly, Rust & SUB-Lang)"
+}
+
+function get_sub_lang_version() {
+    return "SUB-Lang v2.0.0 (Simple Universal Builder)"
+}
+
+function get_author_credits() {
+    return "Designed & Created by Subhobhai & Antigravity (2026)"
+}
+
+function print_sub_kernel_banner() {
+    print("=================================================================")
+    print("   SUB-OS Kernel Signature Module (Powered by SUB-Lang v2.0)")
+    print("=================================================================")
+    print("  Engine : Simple Universal Builder (Native Compiled & Interpreted)")
+    print("  Identity: Multi-Paradigm Native Kernel Extension")
+    print("  Status : Active & Online")
+}