Change Aegis Reset Functionality to use titan chassis ref instead of raw index

[Zanieon]

Currently the index method reset does not correspond properly with the persistent data index, a method of picking titan by their class reference is the optimal idea so this ensures the correct titan will get their Aegis Levels to reset.

Related:

• Add Aegis Rank reset functionality command for Progression #727

[ASpoonPlaysGames]

The indices make sense in pdata, tbh it would be better for this ClientCommand to take a titanRef (from the titanClasses enum in pdef) instead of a raw index.

[Zanieon]

The indices make sense in pdata, tbh it would be better for this ClientCommand to take a titanRef (from the titanClasses enum in pdef) instead of a raw index.

Thanks for the suggestion, changed the method to this and its not swapping between the 3 loadouts due to UI loadout index mismatching with the pdata index.

Current method now is even better so that players can call the command from console and literally have to type the titan chassis name they want to reset (e.g: want to reset Monarch just use ns_resettitanaegis vanguard)

[ASpoonPlaysGames]

Code looks better

[ASpoonPlaysGames]

Just some nitpicks

[ASpoonPlaysGames]

Code looks good

[GeckoEidechse]

Gets Titan chassis id based on name which addresses the passed index not matching up with the one in pdef.

While function signature is updated in this PR, there's no code in Northstar yet that calls it, so no additional changes needed.

Skipping testing for this one cause it's cumbersome and the change appears to be obvious.