Add missing easy mode decks

[OleksandrBerchenko]

• The Flame of the West (both campaign and non-campaign)
• The Mountain of Fire (both campaign and non-campaign)
• Dream-Chaser cycle
• The Sands of Harad
• Haradrim cycle
• The Wilds of Rhovanion
• Ered Mithrin cycle
• Shadow in the East
• Vengeance of Mordor cycle
• Two-Player Limited Edition Starter
• all PoD scenarios except for The Ruins of Belegost