Migrate inline asm call sites to hook.call()

Replace hand-written inline asm blocks with hook.call() typed function
pointer dispatch across 10 files. Also migrates 4 D3D9 COM vtable
NULL-dispatch blocks using ?*anyopaque optional pointers.

Net removal: ~350 lines of inline asm replaced by single-line calls.

src/addons.zig

@@ -343,12 +343,7 @@ fn hideAddonFromList(name: [*:0]const u8) void {
 }
 
 fn callLoadAddonTOC(addon_name: [*:0]const u8) void {
-    asm volatile (
-        \\call *%[func]
-        :
-        : [_] "{ecx}" (@intFromPtr(addon_name)),
-          [func] "{eax}" (@as(u32, 0x0051c9b0)),
-        : .{ .eax = true, .ecx = true, .edx = true, .memory = true, .cc = true });
+    hook.call(fn ([*:0]const u8) callconv(fc) void, 0x0051c9b0, .{addon_name});
 }
 
 // =============================================================================