Storm Knight QoL Update

• Added custom skills (create/edit them in Perks tab).
• (Known issue: custom skills cannot be flagged as favored.)
• Added AP stat to rollable special abilities
• Added chat notes for output with weapon and rollable special ability attacks (keep these brief or you'll clutter your chat log!)
• Added fatigue to character sheet. Fatigue effects can now be added to armor.
• Click on Fatigue label on sheet to automatically increase shock