This is the main and most basic function to run an instance of TGVE without
back-end. Compared to tgve_server, this function only uses
internal functions to setup an instance then opens the entry HTML file.
If a path of an instance is provided it opens it, otherwise creates an
instance from a `tempdir`.
directory of the new instance if `path` is not provided.
Arguments
path
character directory of a current instance to browse. Defaults to
`TEMP_PATH_ENV` environment variable.
browse
boolean to decide whether to browse the instance or not.
remote
boolean whether to run a remote instance of TGVE. If TRUE
the above `path` and `browse` parameters will be ignored. Defaults to `FALSE`
url
if `remote` is true, then this will be used as the parameter
to pass to internal function `openURL`. It defaults, for convenience,
to `https://tgve.github.io/app/` instance.