Particle system + 20.3.0.9 support

@neomonkeus @skyfox69 @jonwd7 @Ghostwalker71 @throttlekitty @nexustheru @amorilia
1. Better support for Skyrim particle system - some "Unknowns" replaced in `NiPSysData` and `BSStripPSysData` blocks.
2. Better support for 20.3.0.9 games Divinity 2 and Black Prophecy. Added structure of `CSStreamableAssetData` block found in .item files (actually nif files) of Divinity 2 game.