Update Spectre Library UI

[Blitz54]

Description of the problem being solved:

Porting over Spectre library changes from PoB2.

• SpectreList.txt is not perfect for finding all possible spectres, and filtering ones already imported. For PoB2 it's easier to deal with as there is much less total spectres. But it's still very handy.
• Monster categories are not listed in the Dat file like for PoE2. This uses the monsterTags and assigns the category based on priority. Unsure if priority is totally correct, but at the moment it's not going to break anyones builds if it's listed wrong. If they make other nodes or uniques that care about monster category, then it will be possible to test things.
• Recommended spectres have not been set yet. I have a general idea of some that are popular, but would appreciate input.
• World areas matching to spectres are not 100% accurate. It's very close, but sometimes the world area does not show the monster varieties found within. The tooltip for the mob itself is the most accurate at the moment.
• Tooltip for world areas can get too tall for some locations.
• Flavour text for areas not found yet >:(

After screenshot: