v24.01 Release Candidate

[chrisandreae]

Rebases to ZMK upstream as of 0e2f94b (2024-01-03).

• Replaces custom peripheral battery reporting with upstream implementation, and now reports absent peripheral with a row of red LEDs.
• Enables CONFIG_BT_SMP_ALLOW_UNAUTH_OVERWRITE by default
• nix build: exports generated kconfig and dts alongside build result

[bryanforbes]

I'm not sure this will work anymore because of the following from app/Kconfig:

choice BT_LL_SW_LLCP_IMPL
    default BT_LL_SW_LLCP_LEGACY if !ZMK_BLE_EXPERIMENTAL_CONN

We need to use ZMK_BLE_EXPERIMENTAL_CONN rather than set all the flags individually so BT_LL_SW_LLCP_IMPL will remain the default (CONFIG_BT_LL_SW_LLCP).

[bryanforbes]

As discussed on Discord, my understanding of this was wrong. You can safely ignore this comment.