Overhaul Modules Shadows of Undrentide

General changes for all 3 modules.

Conversation Checks

The expansion was made before Intimidate was available, therefore actual Intimidate checks are, really, persuade checks with a few modifiers. The scripts are x1_intimdt_low, x1_intimdt_med, x1_intimdt_high but they run a custom check of Persuade + strength modifier, and modifiers like +1 if Half-Orc, armed with a weapon or have the Thug feat.

We could reliably replace these checks with proper Intimidate checks though as a fix/feature.

Also looking through the chapter 1 conversations there are several errors where there are branches for Persuade, Persuade - Lie, Intimidate, etc. but there's no conditional script attached meaning the top option always happens (usually success). Example in q1hkobold for instance. These probably need checking extensively and fixing up.