AtlasSpigot 26.2 - v9 (fewer config files)

Change from v8 - repo structure only, no jar changes:

Removed atlas.yml (renamed purpur.yml), bukkit.yml, commands.yml, config/gale-global.yml, and config/gale-world-defaults.yml from the repo. All five were confirmed via git history to be 100% untouched stock defaults since the initial commit. The server regenerates them with identical content whether they're present or not, so they were pure redundancy - five fewer files to manage, nothing lost.

Checked Purpur's own config specifically for anything worth tuning before dropping it - found nothing at the generic level (it's a gameplay-feature project, not a performance one).

Did not attempt to merge the remaining files into fewer files: Bukkit/Spigot/Purpur/Paper/Leaf-Gale are five separate config systems that each independently load and save their own file. Pointing two at the same physical file means whichever saves last silently overwrites the other's settings - a real risk, not a hypothetical one. Explained in the README instead.

Same jar as v8 (no source changes this round).