New Powers, Vulnys, and Minor Edits to PGF and GM Guide

[LockerM]

In this PR, I...

• [x] Add new Powers across all Roles as part of the Archetype conversion into Skill Trees and create the 07_PCs.yaml input file with 4 Archetypes levels 1-3 #115
• [x] Add 'Duration' as a new Key in the Powers YAML to indicate length of time a Power lasts
• [x] Add new Vulnys to assist with Stat Overrides for Character Creation when reducing an Attribute by -1 or -2 #160
• [x] Update Player Guide Full with a modified reference to common TTRPG systems and update reference to Fatigue, along with other minor edits
• [x] Change Charmed and Enthralled to have saves that happen at the beginning of turn rather than end
• [x] Create a new currency (Diamond Pieces dp) to keep our rule of simple numbers in check, and modified all costs in GM guide to reflect this simpler methodology

[CBroz1]

I think we might need to revisit the file naming. I had previously assumed PCs were in the Bestiary, but we could split it up like Powers and Vulnerabilities currently are.

01_PlayerGuide_Brief.md
01_PlayerGuide_Full.md
02_GMGuide.md
03_CharacterCreation.md
04_Powers.md
04_Powers.yaml
04_Powers_Combined.tsv
04_Vulnerabilities.md
04_Vulnerabilities.yaml
05_Bestiary.md
05_Bestiary.tsv
05_Bestiary.yaml
05_PCs.yaml
06_Items.yaml
99_Glossary.md

I've also seen number prefixing conventions that use 10, 20 - so that later docs can come along to be 11, and avoid restructuring. That would look like this for us

00_PlayerGuide_Brief.md
00_PlayerGuide_Full.md
20_GMGuide.md
30_CharacterCreation.md
40_Powers.md
40_Powers.yaml
40_Powers_Combined.tsv
40_Vulnerabilities.md
40_Vulnerabilities.yaml
50_Bestiary.md
50_Bestiary.tsv
50_Bestiary.yaml
50_PCs.yaml
60_Items.yaml
99_Glossary.md