Added footstep sounds to the Musketeer (default light)

Fixed a tiny grammar mistake in the English version of her Guild's description

- Changed the preview picture
- A couple of other minor edits

Reverted all changes to musketeer skins for better compatibility with musketeer mods (also, disregard the empty updates, I just forgor how to upload mods to the workshop lol)

Improved compatibility with musketeer reworks

- Sidarm icon fix doesn't affect the Circus' version of the icon anymore
- Removed all changes to the position of Skeet Shot's animation (to be more consistent with the Arbalest's Flare skill; I mistakenly assumed it was a bug when in reality it was just an artistic decision)