- Adds a snippet for 1/3 Spellcasting/ClassTables for Issue #191 and builds on PR #1079 to work with v3 (but leaves out Legacy).
- Refactored classTable gen to more closely match monster block gen in terms of element classes (passed to gen function via attributes rather than baked into `return` function)
- Added an "unframed" snippet for each Full, Half, and Third class tables, which is consistent with monster stat blocks, and also is needed to satisfy #191 / #1079.