Various fixes for new-keyboard (#16358)

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

Fix multiple definition errors for trackball "boards" with no keys (#16350)

CLI: Minor additions #12795 (#16276)

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

Xenon: correct QMK Configurator key sequence (#16332)

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

Mode M75S Layout Additions, Configurator Data and Code Touch-Up (#16327)

* m75s.h: correct matrix position identifier

`K5C` is actually on row 4, so it should be `K4C`.

* m75s.h: add matrix diagram

* add QMK Configurator data

* polish whitespace

- convert tabs to spaces
- update indent to four spaces
- remove trailing whitespace

* update readme

Didn't seem to be fully updated after being copied from the M65S codebase.

* add LAYOUT_ansi with keymap

ANSI layout with 2u Backspace.

* add LAYOUT_iso with keymap

ISO layout with 2u Backspace.

* add LAYOUT_ansi_tsangan with keymap

ANSI layout with 2u Backspace and 7u Spacebar.

* add LAYOUT_iso_tsangan with keymap

ISO layout with 2u Backspace and 7u Spacebar.

* add LAYOUT_ansi_split_bs with keymap

ANSI layout with Split Backspace.

* add LAYOUT_iso_split_bs with keymap

ISO layout with Split Backspace.

* add LAYOUT_ansi_tsangan_split_bs with keymap

ANSI layout with Split Backspace and 7u Spacebar.

* add LAYOUT_iso_tsangan_split_bs with keymap

ISO layout with Split Backspace and 7u Spacebar.

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

Digicarp65: fix layouts (#16328)

Fix compilation of ChibiOS UART driver (#16348)

Cherry picked fix from 15724

Format code according to conventions (#16322)

Update keyboard mapping for all moved boards this cycle (#16312)

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

[Keyboard] Convert Maxr1998/Phoebe to use info.json where possible (#16309)

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

[Keyboard] Lulu keyboard by boardsource (#15951)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

Clang-format tweaks (#15906)

[Keyboard] move g heavy industry boards into /gboards (#16040)

Co-authored-by: zvecr <git@zvecr.com>

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