You could, but it's completely unnecessary. The only files which Soldat can't load through from the mods folder are those in interface-gfx\. Scenery files and the tracked songs may also not be loaded, but you don't really see many mods with these things included and I haven't really tested this.
As such, you can load weapons, sounds, gosteks, text files, sparks (including explosions), textures, object graphics and kits. They will be able to go into a mod folder without requiring their own Soldat installation.
Then again, you may be marketing your mod to people without Soldat. In any case, always include a setup without any of the default Soldat graphics for people with it already installed.