Standardise format of guide

[StormPooper]

As mentioned in #94, we should make the guides more consistent.

Some examples of things we could improve (each a pull request candidate, probably).

• Consistent headings and structure
• Consistent usage and spellings of keywords (Witchcraft, Villager, etc)
• Fill out the history section on roles
• Link to things we mention
• Quick facts block for each role - faction, alignment for Seer, etc
• Trim some of the fluff in the longer pages
• SEO stuff in the titles

[ShaneMcC]

Quick facts block for each role - faction, alignment for Seer, etc

Also include if a role can be stolen by the graverobber and if they are witchcraft or not

[ShaneMcC]

A chunk of this (standardised formatting) has been done by @ArchitB17976 in #118, #120, #121, #122, #123