Split mcl_playerplus to mcl_playerinfo for the node info

mods/PLAYER/mcl_playerinfo/README.md

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+# PlayerInfo mod for MineClone 2
+
+This is a helper mod for other mod to query the nodes around the player.
+
+Every half second the mod checks which node the player is standing on, which
+node is at foot and head level and stores inside a global table to be used by mods:
+
+- `mcl_playerinfo[name].node_stand`
+- `mcl_playerinfo[name].node_stand_below`
+- `mcl_playerinfo[name].node_foot`
+- `mcl_playerinfo[name].node_head`
+
+## License
+MIT License
+