Juan Linietsky 0dd65378e7 Add support for command-line user arguments.
Implements the standard Unix double dash (--) commandline argument:
* Arguments after a double dash (--) are ignored by Godot and stored for the user.
* User can access them via `OS.get_cmdline_user_args()`

Example:

`godot.exe scene_to_run.tscn --fullscreen -- --start-level 2`
2022-08-01 00:56:59 +02:00
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2022-07-29 16:26:13 +02:00
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