feat: Game engine changes

[markpol]

Many changes related to additional metadata and better field normalisation for preparing use of data in dynamic game engine:

• removed non combat related equipment, equipment categories, character starting equipment and race proficiencies
• started removal of non combat related spells
• Classes: emptied all ability skill proficiency choices
• Features: removed expertise features for bard and rogue and Thieves' Cant
• Proficiencies: remove all skill proficiencies
• Races: removed languages, non-combat traits and skill starting proficiencies
• Traits: removed non-combat traits
• converted all speed values to integers
• added action_type and bonus_actions props to goblin
• city home and tavern screens
• awarding coin loot and xp after battle
• added CR 0 monsters with image svg icons
• added attack_type property
• added poison damage and poisoned condition nodes to low level monsters
• added data properties to support charge and relentless special monster abilities
• added data properties to support pounce special monster abilities
• added some attack_type properties
• removed net weapon
• added some attack_types to monsters
• removed all non equipment and saving throw proficiencies
• added enraged and reckless to conditions
• added exhaustion condition levels
• modified frenzy feature to be mandatory for every rage
• added more attack_types to monsters
• added monster grapple/restrained condition damage
• added dodging condition
• added frenzied condition
• restart reckless condition
• first compatibility pass over CR 3 monsters
• added purchasing magic items
• added healing potion usage in encounters
• added damage-type-resistance to magic item effects
• removed unusable magic items
• added enchantment properties to basic weapon and armor magic items
• added poison condition to Detch fetid cloud special action
• mephit fire breath and mummy dreadful glare fixes
• added equipment materials
• handle rust monster actions
• added corrosion damage to equipment and refactor
• refactored damage dice parsing
• removed frog, seahorse and shrieker monsters b/c they have no actions
• added behavior tree lib and implemented for monster adversary turn
• refactored adversary and turn models
• fixed some "Player" labels, replacing with "You"
• added infested condition
• added swallowed condition
• handle giant frog swallow action
• fixed giant frog action
• removed martial arts description of alternate monk weapons
• fixed pounce / charge with bonus action on prone
• added missing grapple to giant crab
• fixed winter wolf cold breath dc success type
• added metadata to giant toad Swallow attack
• fixed quasit's scare attack
• added weakened condition
• added shadow monster and strength drain ability
• removed duplicate usage node from magma-mephit
• adjusted prone condition damage duration to 2 rounds
• renamed weakened condition to drained-of-strength
• handle gold-dragon-wyrmling weakening breath
• handle paralyzed and slowed (ghoul and dragon wyrmlings)
• handle life drain
• implemented harpy charm attack
• removed musical proficiencies from classes
• added environments to monsters CR 5 and lower
• re-added skill proficiencies
• fixed ankheg xp
• added stackable property to equipment items
• restored adventuring gear equipment
• restored (most) adventuring gear equipment
• added ammunition property to ranged weapons
• Added stackable property to rations
• added is-consumable and damage effect to acid-vial and alchemists-fire-flask
• added prices to some magic items
• Added disengaged condition
• Added custom properties to some magic items
• added surprised condition (to allow surprise attacks)
• Fixed ring of protection effect data
• relaxed and bumped node engine restriction in package.json