fix: Action did not work on Windows runners. (#257)

* Remove symlink files

* Update entrypoint scripts for windows runner

* Add windows runner tests

* Fix unity editor path

* Set -nographics option for avoid d3d11 initialization error

* Fix Unity project path in windows standalone build script

dist/post.js

@@ -1 +0,0 @@
-index.js

dist/post.js

@@ -0,0 +1,3 @@
+const index = require('./index.js');
+
+index.post();