Sundry minor fixes

[dracontes]

Decided to redo this pull request from scratch as well, given the unsolvable mess it stemmed from. I do hope things are more manageable now.

• ~Updated Mythos of Snapdax to reflect the admittedly contrived possibility of a planeswalker also being a land.~ Fixed elsewhere: https://github.com/Card-Forge/forge/pull/4093 .
• Fixed inconsistent capitalization issues regarding a few parameters, always defaulting to the more common version. -- sVars$ --> SVars$ -- staticAbilities$ --> StaticAbilities$
• Cleaned up typos found while sifting scripts, namely double whitespace sequences and other recurrences.
• Per discussion on Discord, added Creature to the AddTypes$ parameter of the CopyPermanent effect of Brenard, Ginger Sculptor and Synth Infiltrator to follow the relevant rulings.
• ~Fixed extraneous capitalization in Butch DeLoria, Tunnel Snake's script filename.~ Fixed elsewhere: https://github.com/Card-Forge/forge/commit/bd442ccc0c92b1678629cc2310f19be0795f8f11 .