Extended block shapes

• Fixed the issue of missing rendering at the bottom of vertical stairs blocks.
• For 1.16 versions: Removed unnecessary tags and fixed mining level issue.
  • Note: For 1.16 versions, language files for future versions are still stored.

Note: This version is tested fine for 1.16.5, and should be compatible with nearby versions in theory, including snapshots (however not recommended). If you find any bugs that exist for 1.16, 1.16.1 etc. but do not exist for 1.16.5, feel free to inform me!