feat: init mlkem project with Verilator test framework

- sync_rtl/common/: skid_buffer, pipeline_reg, defines (valid/ready)
- sync_rtl/mod_add/: modular adder example with Verilator C++ TB
- test_framework/: Python-driven Verilator compile/sim/compare pipeline
- test_framework/modules/mod_add/: 50-vector test plan, full鏈路 PASS
- .trellis/spec/: RTL and test_framework conventions documented

obj_dir/Vmod_add_sync___024root.h

@@ -0,0 +1,57 @@
+// Verilated -*- C++ -*-
+// DESCRIPTION: Verilator output: Design internal header
+// See Vmod_add_sync.h for the primary calling header
+
+#ifndef VERILATED_VMOD_ADD_SYNC___024ROOT_H_
+#define VERILATED_VMOD_ADD_SYNC___024ROOT_H_  // guard
+
+#include "verilated.h"
+
+
+class Vmod_add_sync__Syms;
+
+class alignas(VL_CACHE_LINE_BYTES) Vmod_add_sync___024root final {
+  public:
+
+    // DESIGN SPECIFIC STATE
+    VL_IN8(clk,0,0);
+    VL_IN8(rst_n,0,0);
+    VL_IN8(valid_i,0,0);
+    VL_OUT8(ready_o,0,0);
+    VL_OUT8(valid_o,0,0);
+    VL_IN8(ready_i,0,0);
+    CData/*0:0*/ mod_add_sync__DOT__u_pipe__DOT__valid_r;
+    CData/*0:0*/ __VstlFirstIteration;
+    CData/*0:0*/ __VstlPhaseResult;
+    CData/*0:0*/ __VicoFirstIteration;
+    CData/*0:0*/ __VicoPhaseResult;
+    CData/*0:0*/ __Vtrigprevexpr___TOP__clk__0;
+    CData/*0:0*/ __Vtrigprevexpr___TOP__rst_n__0;
+    CData/*0:0*/ __VactPhaseResult;
+    CData/*0:0*/ __VnbaPhaseResult;
+    VL_IN16(a,11,0);
+    VL_IN16(b,11,0);
+    VL_OUT16(sum,11,0);
+    SData/*12:0*/ mod_add_sync__DOT__add_raw;
+    SData/*11:0*/ mod_add_sync__DOT__u_pipe__DOT__data_r;
+    IData/*31:0*/ __VactIterCount;
+    VlUnpacked<QData/*63:0*/, 1> __VstlTriggered;
+    VlUnpacked<QData/*63:0*/, 1> __VicoTriggered;
+    VlUnpacked<QData/*63:0*/, 1> __VactTriggered;
+    VlUnpacked<QData/*63:0*/, 1> __VnbaTriggered;
+
+    // INTERNAL VARIABLES
+    Vmod_add_sync__Syms* vlSymsp;
+    const char* vlNamep;
+
+    // CONSTRUCTORS
+    Vmod_add_sync___024root(Vmod_add_sync__Syms* symsp, const char* namep);
+    ~Vmod_add_sync___024root();
+    VL_UNCOPYABLE(Vmod_add_sync___024root);
+
+    // INTERNAL METHODS
+    void __Vconfigure(bool first);
+};
+
+
+#endif  // guard