Fix numpad hotkey

[Avasam]

Fixed the numpad hotkeys by getting the key event instead of the name directly. Then checking if it's a keypad event and between [0, 9]. This is necessary because of keyboard's use of _canonial_names. See: boppreh/keyboard#161 (comment)

I've refrained from changing too much here, but the hotkeys module really needs a good refactoring to reduce duplicate code.

Fixes #8
Fixes #25

[Avasam]

As discussed in Discord. While this fixes being able to assign numpad keys, AutoSplit still doesn't make the difference between numpad and regular keys. Hitting either will trigger the hotkey.
One possible solution is to use keycodes instead of strings.

[Avasam]

Now using hooks. For ease of review, I'll copy new code comments here:

# We need to inspect the event to know if it comes from numpad because of _canonial_names.
# See: https://github.com/boppreh/keyboard/issues/161#issuecomment-386825737
# The best way to achieve this is make our own hotkey handling on top of hook
# See: https://github.com/boppreh/keyboard/issues/216#issuecomment-431999553

# NOTE: This is a workaround very specific to numpads.
# Windows reports different physical keys with the same scan code.
# For example, "Home", "Num Home" and "Num 7" are all "71".
# See: https://github.com/boppreh/keyboard/issues/171#issuecomment-390437684
#
# We're doing the check here instead of saving the key code because it'll
# cause issues with save files and the non-keypad shared keys are localized
# while the keypad ones aren't.
#
# Since we reuse the key string we set to send to LiveSplit, we can't use fake names like "num home".
# We're also trying to achieve the same hotkey behaviour as LiveSplit has.

# Prevent "num delete", "num dot" and "delete" from triggering each other as well as "dot" and "num dot"
# Prevent "action" from triggering "numpad" hotkeys
# Prevent "regular number" from activating "numpad" hotkeys
# Prevent "numpad" from activating "regular number" hotkeys
# Prevent "num action" keys from triggering "regular number" and "numpad" hotkeys.
# Still allow the same key that might be localized differently on keypad vs non-keypad
# TODO: "delete" won't work with "num delete" if localized in non-english

[Avasam]

Uh, just noticed this branch accidentally included the LiveSplit integration, not sure how that happened. Cleaned it up, and retested to be fully working 👍