Enhance CLI (sdtin and Raidsim)

[Serverfrog]

Is your feature request related to a problem? Please describe.
Currently the Raidsim has no possible way to use the Blessing parts of the sim (for example Unholy Frenzy on Player 3).
Also the only way to feed the Data into the CLI is via an File.

Describe the solution you'd like

1. Make --infile the same as --outfile, just that it will, if not set use stdin
   1.1 Or make an additional parameter like --stdin that will used
2. Have beside the sim CLI option, also an raidsim option, so that exported Raid's could be simulated with their settings of blessings

Describe alternatives you've considered
For the stdin part: writing the file, run CLI, remove file. Its doable, but kinda awkward
For Raidsim: nothing, as this is not really implemented in cata currently, in WotLk the Raidsim exists, but the CLI don't use this feature

Additional context
I try to build an Discord bot where Guild officers can mange the Raid (with Equipment and Blessings, etc) and everyone in the guild can then send a Request to sim their own character so they will get their singledps (as a normal sim) and the possible Raid DPS increase