feat(FN-2690): add Windows cmd wrappers for script entrypoints

- Add .cmd wrappers for audit-squash-merge, check-test-isolation, dev-hmr, dev-with-memory, release, and sync-fusion-skill-tools scripts
- Resolve each wrapper relative to its own script directory via %~dp0 so calls work from any working directory
- Forward all CLI arguments with %* to preserve existing script behavior under cmd.exe

scripts/dev-hmr.cmd

@@ -0,0 +1,5 @@
+@echo off
+setlocal
+set "SCRIPT_DIR=%~dp0"
+node "%SCRIPT_DIR%dev-hmr.mjs" %*
+endlocal