Stone, lode, and lux tools now all have their handles burn, and
eject the non-flammable portions of the tool.
Now using a unified on_ignite hook for when flammable things catch
fire. The call is made BEFORE the node is replaced, and has an
opportunity to look at node metadata and eject anything
non-flammable.
It can be a function, e.g. for shelves, or a static value in the
same format that the function would return (e.g. for lode tools
which need string values for temper substitutions).
If it returns a string or itemstack, it will eject that from the
position where the node burned. If it returns a table it will
eject all the values of that table.
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