v2.0.0

feat!: update to Geode 5.0.1 and change leaderboard update trigger (#1)

- feat!: trigger leaderboard updates from level info flow (open/download/enter) instead of on death
- fix!: update project target to Geode 5.0.1 and GD
- chore!: bump to v2.0.0 and move mod id to arlind-dev.autoleaderboard
- chore: remove unneeded dependencies and declare incompatibilities with legacy variants
- docs: refresh README/about/changelog for continuation fork and updated links
- ci: add workflow permissions and a manual release job