feat(packets): add many new packets

fix(packets): make correct fields in drop packet

fix(packets): make repuration icon signed

Revert "feat(packets): make position ushort"

This reverts commit 8610668d17586fc8d502d8c86842af9504729c7a.

feat(packets): make position ushort

Merge pull request #8 from Rutherther/game-objects

Game objects

feat(samples): add sample with loading data from a file

docs(packets): add missing documentation

feat(packets): add entities and maps packets

feat: split packets definitions into separate assembly