1.4.0 - Weapon Skills rework

DISCLAIMER: Reworked skill ID, and node IDs!

• Added new skill tree tab to host independent weapon skills:
  • ID: skill_tree_rpgs:weapon_skills
  • 16 new skills
  • 1 static skill, and 1 choice out of 2, per weapon type
  • default point cap of 6
• Reworked skill tree tab ID:
  • skill_tree_rpgs:skill_tree_rpgs -> skill_tree_rpgs:class_skills
• New skill ID formulas
  • Spell modifiers: class_tier_{tier}_spell_{choice}_modifier_{modifier} - for example archer_tier_3_spell_1_modifier_2
  • Passive spells: class_tier_{tier}_passive_{choice} - for example archer_tier_3_passive_1
  • Also applies to skill tree node IDs
• Add conditional attributes feature
• Fixed missing cooldowns on some warrior passives
• Reworked warrior "Trample" skill, replaced by "Second Wind"