Add transform44 module stub for M2 bone transform optimization

Wires transform44 into build system and main.zig module table.
Module skeleton with mutex/logger, no hooks yet — analysis in progress.

src/transform44/transform44.zig

@@ -0,0 +1,41 @@
+//! transform44 — hook for transformMatrix4x4 (0x714260)
+//!
+//! transformMatrix4x4 is the main per-frame bone transform engine for M2 models.
+//! 17703 bytes, processes bone entries (0x118 bytes each, array at model+0x90).
+
+const std = @import("std");
+const hook = @import("zhook");
+const logging = @import("../logging.zig");
+const mod_mutex = @import("../mutex.zig");
+
+pub const module_name: [*:0]const u8 = "transform44";
+
+var g_mutex: ?*anyopaque = null;
+var g_is_hook_owner: bool = false;
+var log: logging.Logger = .{};
+
+pub fn isActive() bool {
+    return g_is_hook_owner;
+}
+
+// =============================================================================
+// Install / remove
+// =============================================================================
+
+pub fn installHooks() void {
+    const result = mod_mutex.acquire(module_name);
+    g_mutex = result.handle;
+    g_is_hook_owner = result.is_owner;
+    if (!g_is_hook_owner) return;
+
+    log = logging.Logger.open(module_name, .both);
+    log.print("transform44 module loaded\n");
+}
+
+pub fn removeHooks() void {
+    if (g_is_hook_owner) {
+        log.close();
+        mod_mutex.release(&g_mutex);
+    }
+    g_is_hook_owner = false;
+}