silicon: add 116 probe hooks for call-counting all explored functions

Probe infrastructure using comptime probeDetour() that generates
per-function detours: atomic counter increment + callOriginal passthrough.
Hit counts reported on shutdown. Hooks installed at lateInit (engine init),
not DLL load time.

Key findings during decompilation:
- 0x40CF81 is GetFPUControlWord, not ftol (silicon mislabel)
- Real __ftol at 0x40A2B0 (51+ callers, hot path)
- 0x7B7A80/7B7B10 use normal stack floats, not FPU register params
- 0x686640/686820/6868E0 are bounding volume ops, not vector ops
- 0x7786A0 is a UI model constructor, not SetModelLighting

src/main.zig

@@ -43,6 +43,7 @@ const transform44 = if (build_opts.transform44) @import("transform44/transform44
 const addonperf = if (build_opts.addonperf) @import("addonperf/addonperf.zig") else struct {};
 const ssemaths = if (build_opts.ssemaths) @import("ssemaths/ssemaths.zig") else struct {};
 const file_cache = if (build_opts.filecache) @import("filecache/filecache.zig") else struct {};
+const silicon = if (build_opts.silicon) @import("silicon/silicon.zig") else struct {};
 
 const module_active = @import("module_active.zig");
 
@@ -691,6 +692,9 @@ fn engineInitDetour() callconv(hook.cc.stdcall) void {
     if (build_opts.ssemaths) {
         ssemaths.lateInit();
     }
+    if (build_opts.silicon) {
+        silicon.lateInit();
+    }
 }
 
 // =============================================================================
@@ -765,6 +769,7 @@ const modules = [_]ModuleHooks{
     if (build_opts.interact) .{ .name = interact.module_name, .install = interact.installHooks, .remove = interact.removeHooks, .is_active = interact.isActive } else .{},
     if (build_opts.outline) .{ .name = outline.module_name, .remove = outline.cleanup, .is_active = outline.isActive } else .{},
     if (build_opts.screenshot) .{ .name = screenshot.module_name, .remove = screenshot.removeHook, .is_active = screenshot.isActive } else .{},
+    if (build_opts.silicon) .{ .name = silicon.module_name, .install = silicon.installHooks, .remove = silicon.removeHooks, .is_active = silicon.isActive } else .{},
 };
 
 fn shutdownDetour() callconv(hook.cc.stdcall) void {