mount() should call mkdirTree() internally

[adamziel]

Since it's not possible to mount a directory in a location that doesn't exist, PHP.mount() should assume rational intention and create the directory in the virtual file system if it's missing. Right now it doesn't and errors out in a confusing way.

[adamziel]

This have been resolved:

wordpress-playground/packages/php-wasm/node/src/lib/node-php.ts

Lines 129 to 132 in 413d07f

	mount(localPath: string | MountSettings, virtualFSPath: string) {
	if (!this.fileExists(virtualFSPath)) {
	this.mkdirTree(virtualFSPath);
	}