Add board specific to Proton-C, with usual defaults turned on. (#10976)

- Set all other ChibiOS defaults to 'off', when not targeting Proton-C
- Modified all existing F303 boards to point at the QMK_PROTON_C to ensure repeatable binary output
- Modified version.h generation so that SKIP_VERSION=yes generates the same output

Merge remote-tracking branch 'origin/master' into develop

TKC TKL_A/B87: Initial support (#10943)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

Merge remote-tracking branch 'origin/master' into develop

[Keyboard] Fix issue with Kyria and RGB Light (#11070)

Add recommendation to default firmware https://docs.splitkb.com/hc/en-us/articles/360017633199-The-keyboard-behaves-erratically-after-changing-the-RGB-settings

Merge remote-tracking branch 'origin/master' into develop

Fix Valor default underglow (#11093)

Merge remote-tracking branch 'origin/master' into develop

[Keyboard] Fix compiler issues for handwired/6macro (#11098)

[Split] Sync Timer feature (#10997)

A timer that is kept in sync between the halves of a split keyboard

Add support for Drop + Ryloo Studio "Hello" M0110. (#11050)

Merge remote-tracking branch 'origin/master' into develop

fix handwired/swiftrax/beegboy keymaps (#11071)

Co-authored-by: Swiftrax <swiftrax@gmail.com>

fix handwired/swiftrax/bebol keymaps (#11072)

Co-authored-by: Swiftrax <swiftrax@gmail.com>

Merge remote-tracking branch 'origin/master' into develop

Moved default LALT and LWIN for BKS65 (#11087)

Merge remote-tracking branch 'origin/master' into develop

Adding bootleg and waffling60 rev b (#10846)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

Merge remote-tracking branch 'origin/master' into develop

nix-shell: add milc dependency (#11086)