[Update] package.json: Add task-kill script to terminate VRCT-sidecar.exe before development builds

[Add] task_kill.py: Implement script to forcefully terminate VRCT-sidecar.exe

task_kill.py

@@ -0,0 +1,12 @@
+import subprocess
+
+# VRCT-sidecar.exe を強制終了
+try:
+    subprocess.run(
+        ["taskkill", "/IM", "VRCT-sidecar.exe", "/F"],
+        check=False,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL
+    )
+except Exception:
+    pass