Missing walk animations for tools section axe (fixed), hammer and pickaxe (fixed)

[sanderfrenken]

Add walk animations from https://opengameart.org/content/lpc-hand-tools when they are finished.

[bluecarrot16]

For the most part it should be possible to adapt these from here https://opengameart.org/content/lpc-smash-weapons by splitting into layers as appropriate

[sanderfrenken]

Indeed, did it in #115 for the axe and pickaxe, only the hammer remains.