Added a shift-list property to caps word to allow adding more keys to
be shifted aside from alpha keys.
Added a &prog_word behavior, which is the same as &caps_word, except it
adds MINUS to shift-list (this matches QMK's caps word behavior).
Added a no-default-keys property to caps_word, which removes the
implicit alphanumeric keys from continue-list and shift-list so you can
fully customize the lists.
Also adjusted the default continue keys to include numpad numbers,
since those are numbers too.
Removed the label property from built-in behaviors, custom behaviors
defined in a few keymaps, and macros generated with ZMK_MACRO().
Now that node names are used to identify behaviors, and names only need
to be unique within the set of behaviors, the names of all behaviors
have been shortened to be similar to their original labels.
This means that any keymaps which reference behavior nodes by name
instead of by label will need to be updated. Keymaps typically use the
labels though, so most keymaps should be unaffected by this change.
