This does a bunch of crazy stuff:
- The ability to set a unicode mode (right now only Linux+ibus or
MacOS-RALT) in the keymap. This will be changeable at runtime soon, to
allow a single keyboard to be able to send table flips and whatever
other crazy stuff on any OS the board is plugged into (something that's
not currently doable on QMK, so yay us?)
- As part of the above, there is now just one user-facing macro for
unicode codepoint submission,
`kmk.common.macros.unicode.unicode_sequence`. Users should never use the
platform-specific macros, partly because they just outright won't work.
There's all sorts of fun stuff in these methods now, thank goodness
MicroPython supports the `yield from` construct.
- Keycode (these should really be renamed Keysym or something) objects
that are intended to not be pressed, or not be released. Right now these
properties are completely ignored if not part of a macro, and it's
probably sane to keep it that way. This was necessary to support MacOS's
"hold RALT while typing the codepoint characters" flow.
- Other refactor-y bits, like moving macro support to `kmk/common`
rather than sitting at the top level of the tree. One day `kmk/common`
may make sense to surface at top level `kmk/`, but that's a discussion
for another day.
This removes the need for the user to define... most things, honestly.
Notably, `main()` is no longer the end user's responsibility. This also
allows us to do fun stuff going forward like validating keymaps for
sanity (ex: the key assigned to `KC_MO(x)` should be assigned to
`KC_TRNS` on the target layer or the user will never be able to escape
that layer).
This also disambiguates `BOARD` to always refer to an actual slab of
silicon, renaming to `USER_KEYMAP`.
Entrypoints are now a bit more wild, and mostly-unsupported boards no
longer have working entrypoints. It's probably just time to scrap those
boards for now (until we have BLE HID and/or bitbang USB HID, at least).
