Resource Tree improvements

[Exter-N]

Materials

• Avoid some of the I/O to determine texture/sampler names (now only the shpk files are re-read from disk, the sampler IDs are pulled from the in-memory structures already used by ME99) ;
• This should make the texture name guesser more effective, as a side-effect.

Skeletons

• Use the in-memory skeleton structure to pull all the relevant sklb files, not just the base one (obligatory "Xande when?" ) ;
• Add skp files, as sub-nodes of associated sklb files.

Shaders and Textures

• Pull the full paths from the resource handles instead of resolving them through the collection, for consistency with the rest of the system.

General back-end

• Pull both instantiated object address and resource handle, where applicable, to show them in debug mode ;
• Deduplicate nodes where applicable, to avoid recalculation of the whole sub-tree of shared materials – technically, that makes the thing a Resource DAG, not a tree anymore, I didn't rename it though ;
• Make redacting of full paths that are neither vanilla paths nor within the Penumbra root directory optional, in preparation of "get local player redirections" IPC (in On-Screen / Import from Screen, they will stay redacted).

Resource Tree Viewer

• Add ChangedItem-like icons to the rows ;
• Rework the fold/unfold glyphs (using the same as the sampler fold/unfold buttons in ME99) and alignment ;
• Make sure a row won't appear unfoldable if it has no visible child rows (i. e. not in debug mode and all child rows are internal, which can happen now with skp) ;
• Make internal nodes appear "grayed out".