* Document setting up studio for a new keyboard definition.
* Document how to enable ZMK Studio for a build, adding reserved layers,
and controlling which behaviors are built into a studio firmware.
* Document `&studio_unlock` behavior.
* Document studio configuration options.
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
* UART and BLE/GATT transports for a protobuf encoded RPC
request/response protocol.
* Custom framing protocol is used to frame a give message.
* Requests/responses are divided into major "subsystems" which
handle requests and create response messages.
* Notification support, including mapping local events to RPC
notifications by a given subsystem.
* Meta responses for "no response" and "unlock needed".
* Initial basic lock state support in a new core section, and allow specifying
if a given RPC callback requires unlocked state or not.
* Add behavior subsystem with full metadata support and examples of
using callback to serialize a repeated field without extra stack space needed.
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
