New SSG Sprite for Vanilla Doom addon

Containing two WADS and two TXT files.

HANDSSG-NONALIGNED.WAD: Intended to be used WITHOUT any sprite adjustments/realignment modifications, such as Doom 2 Minor Sprite Fixing Project or any source port that fixes it.

HANDSSG-ALIGNED.WAD: intended to be used WITH Doom 2 Minor Sprite Fixing Project, or any source port that has this feature, similar to DOOM Retro's "r_fixspriteoffsets" console variable (enabled by default).

All sprites have been taken from Weapons of Saturn v2.0b, respectfully created by Lippeth.