Update documentation examples

[MysteryBlokHed]

Pull request #7 added a :tag keyword and removed the generate_func_tags config option. Most documentation examples still use files named load.databind and tick.databind, but these files are no longer automatically tagged. Examples should be replaced with single main.databind files using functions tagged with :tag, like this:

example/data/example/functions/main.databind

:func load :tag load
tellraw @a "Loaded"
:endfunc

:func tick :tag tick
tellraw @a "Ticking"
:endfunc

Transpiled output should be able to stay the same, assuming that the function names stay the same.