Refactor sleep handling and WASM task termination; consolidate platform-specific sleep functions and improve task cleanup logic

software/build.bat

@@ -1,4 +1,8 @@
+pushd "%~dp0"
+
 @REM tinygo build -o ../simulator/sd/slot0/init.wasm -target wasm-unknown init.go
 
 @REM zig build-exe init.zig -target wasm32-freestanding -fno-entry -O ReleaseSmall -femit-bin=../simulator/sd/slot0/init.wasm
-zig build-exe init.zig -target wasm32-freestanding -O ReleaseSmall -femit-bin=../simulator/sd/slot0/init.wasm
+zig build-exe init.zig -target wasm32-freestanding -O ReleaseSmall -femit-bin=../simulator/sd/slot0/init.wasm
+
+popd

software/init.zig

@@ -5,7 +5,7 @@ pub fn main() void {
     while (true) {
         nova64.log("Hello from Zig!");
         // nova64.yield();
-        // nova64.sleep(1000);
+        nova64.sleep(50);
     }
 }