ResourcePackManager

Resource Pack Manager 1.7.6:

• [Fix] Fixed non-standard top-level keys in pack.mcmeta (e.g. Sodium's ignored_shaders) being silently dropped during resource pack merging.
• [Fix] Fixed overlay entries missing min_format/max_format fields causing "resource reload failed" on 1.21.9+ clients — RSPM now normalizes overlay entries from third-party packs that haven't updated to the new format.
• [Fix] Fixed NoSuchFileException during resource pack mixing by creating parent directories.
• [Fix] Fixed SHA1 watchdog check crashing for cluster packs where the source is a directory.
• [Fix] Fixed file copy failures on Windows caused by file locks — now retries with Bukkit scheduler.
• [Fix] Fixed major merge logic issues with resource pack mixing, including improved handling of 1.21.4+ item model definitions, sounds.json merging, atlas merging, and legacy model overrides.
• [New] Migrated to NightbreakPluginBootstrap and Magmacore 2.0.0-SNAPSHOT.