Chemistry RTX - Education Edition Extensions for Vanilla RTX

With this release, all three variants of Chemistry RTX (Regular/Normals/Opus) are bundled inside one .mcaddon file which imports all three packs at once.
This format is also supposed by the Vanilla RTX App for bulk imports from a single file, and you can discard/uninstall the variants you do not use.

Release Notes:

- Chemistry RTX Opus has been updated with normal map style that now matches the latest version of Vanilla RTX Opus

- Added Parallax Occlusion Mapping (POM) data to Chemistry RTX Normals and Chemistry RTX Opus' normal maps
This feature is not used with Default RTX or Vibrant Visuals, and requires an appropriate BetterRTX 1.5+ preset.

- All three pack's PBR formats have been updated to include the Subsurface Scattering property, some blocks, such as glass, feature subsurface scattering
This feature is not used with Default RTX, but with appropriate BetterRTX 1.5+ presets, as well as Vibrant Visuals.

- Removed padding property from all three packs (unused in more recent Minecraft versions) & raised minimum engine version to 1.21.100 (should have been higher, but due to a Minecraft bug, this is the highest possible I can set at the moment) - PBR formats are now consistent with the upcoming Vanilla RTX 1.26.20+ update.

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- Note for moderators:
I uploaded this update, I wanted to make a minor edit, archived it before it was approved as to hide it from the public, then reuploaded it again, but the new one got flagged as a dupe even though technically speaking, the older version was archived/shouldn't have become available. 
Delete button for that older upload became available to me later, I've since deleted it, hopefully this one gets approved, since there's no longer a dupe sitting in my archives. 
I reuploaded primarily because I wasn't sure if editing file display name from dashboard affects the actual downloadable file name, but that's another story...