Disables rgblight twinkle by default. (#13677)

This takes up about 700 bytes of space, and needs to be swapped to
opt-in, rather than opt-out. Build failures in general on AVR due to the
scarcity of available flash. People can re-enable it by adding to their
keymap's config.h files:

```
  #define RGBLIGHT_EFFECT_TWINKLE
```

[Keyboard] Fix split matrix for sekigon grs 70ec (#13672)

[Keyboard] Fix matrix delay on Drop boards (#13671)

[Keyboard] Disable console by default on all Keebio boards (#13649)

CLI/Docs: Fix the format commands' name (#13668)

PR #13296 changed the name of the `cformat` and `pyformat` commands to
`format-c` and `format-py` respectively. This PR updates the documentation
and some parts of the CLI to use the new names.
Also add documentation for the new `format-text` subcommand, introduced
in the same PR.

[Keyboard] Enable LTO by default on BastardKB Scylla (#13664)

[Keyboard] Fix symmetric70_proto build break on develop branch (#13667)

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

[Keyboard] Remove broken, unmaintained converter/ibm_5291 (#13658)

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

[Keyboard] Add model-v keyboard (#13643)

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

[Keyboard] Fix dc01/left so that it doesn't throw a warning (#13653)

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

[Keyboard] Add Txuu keyboard (#13650)

Co-authored-by: Ryan <fauxpark@gmail.com>

[Keymap] Reduce NIBBLE oled_bongocat keymap size so it compiles (#13638)

Fix errors with matrix_output_unselect_delay function calls (#13645)

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

Add backslash in lily58 domnantas keymap (#12713)

[Keyboard] Fix matrix issues with Promethium (#13648)

[Keyboard] Fix Matrix Row number for ggkeyboards/genisis (#13647)

[Keyboard] Fix default keymap for 0xCB 1337 keyboard (#13646)