Gracefully Handle Errors Around Not Having

[hal-8999-alpha]

We should gracefully handle if someone does not have assets

`Traceback (most recent call last): File "", line 198, in _run_module_as_main File "", line 88, in _run_code File "C:\Users\Jayson.conda\envs\pieces\Scripts\pieces.exe__main__.py", line 7, in File "C:\Users\Jayson.conda\envs\pieces\Lib\site-packages\pieces\app.py", line 127, in main args.func(**vars(args)) File "C:\Users\Jayson.conda\envs\pieces\Lib\site-packages\pieces\commands\cli_loop.py", line 54, in loop startup() File "C:\Users\Jayson.conda\envs\pieces\Lib\site-packages\pieces\commands\commands_functions.py", line 55, in startup current_asset = get_asset_ids(1)[0] # default current asset to the most recent

IndexError: list index out of range`