Change fscalar to ks

[thenetworkgrinch]

fscalar in the JSON config is ks and following some normalized documentation should be preferred.

Deferring to @7910f6ba7ee4 since this is a major design change to a function used by them (and apparently all other falcon teams).

[7910f6ba7ee4]

fscalar I think is not exactly ks (?) since it's a scalar being applied to an already existing configuration angleKv (since the feedforward when it gets to the angle motor has already been multiplied by this Kv).

I also may have found where the issues have originated, which might not require an fscalar anymore. The talons apparently have their feedforward in percentage, not volts. I'm currently now testing feedforward with it simply scaled down with the nominal voltage, and it seems to work well, I'll make an issue for it later.

[thenetworkgrinch]

Feel free to commit the solution after testing!