Forever QuickJoin v0.6.6

• Restricted Advanced Filters to WoW Forever's nine playable classes: Warrior, Paladin, Hunter, Rogue, Priest, Shaman, Mage, Warlock, and Druid.
• Replaced the single playstyle selector with independent Exclude these playstyles checkboxes for Learning, Relaxed, Competitive, and Carry Offered.
• Removed the Include groups with unreadable rosters checkbox. Class exclusions remain conservative when member classes are unavailable.
• Cleaned old saved settings for retail-only classes, the prior playstyle selector, and the removed roster option. Valid class exclusions and new playstyle exclusions persist.
• Rewrote the README as user-facing documentation covering features, installation, commands, and limitations.