[Keyboard] Add mousekey support for Technik variants (#15258)

Co-authored-by: filterpaper <filterpaper@localhost>

[Keyboard] Add "DogTag" (#15259)

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

[Keyboard] Sweep swap hand feature and pin documentation (#15264)

Co-authored-by: filterpaper <filterpaper@localhost>

[Keyboard] Code updates for macro3 (#15280)

Co-authored-by: filterpaper <filterpaper@localhost>

feat: adding carlosala keymap (#15281)

[Keyboard] Add Galatea TKL PCB. (#15290)

[Keyboard] Add Vertex 40% (#15323)

[Keymap] Unicode and cursor sync - drashna keymap (#15328)

Fix keyboard level use of OLED_DRIVER_ENABLE (#15343)

fixed oled in bongocat keymap and fixed encoder direction (#15232)

* fixed oled in bongocat keymap (#13454) and fixed encoder direction for prod parts

* updated readme for launch later today

Add TRNS to LOWER layer (#15288)

This commit makes the mode keys transparent in the LOWER layer instead
of disabled.

Before this commit, the following sequence of key presses `LGUI+LOWER+l`
would translate into `Cmd+right` in macOS and, therefore, move the
cursor to the end of line.

But, pressing `LOWER+LGUI+l` would completely ignore the `LGUI` and,
therefore, move the cursor one letter to the right.

With this change, pressing `LOWER+LGUI+l` produces the same result as
`LGUI+LOWER+l`.

This is also true for multiple other combinations, like
`RALT+SHIFT+LOWER+l`, `LOWER+RALT+SHIFT+l`, `SHIFT+LOWER+RALT+l`, etc.

Co-authored-by: Gaston Jorquera <gjorquera@gmail.com>

Enable RGB Matrix animations being used (#15338)

[Keyboard] Add Nozbe Macropad (#14803)

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

Meridian LED update (#15329)

* Meridian first update

* Update README, adjust timing settings

* Update README

[Keyboard] Add 40percent.club's 'polypad' PCB (#15158)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Sergey Vlasov <sigprof@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

Fix last merge date (#15327)

[Bug] Xelus Keyboards 400kHz i2c fix (#15315)

* 400khz fix

* fix valor rev2 timing

* keep consistent

Changelog 2021q4 (#15325)

* Changelog.

* Remove the asymmetric encoder PR from listing due to revert.

* More docs

* More docs

* More docs

* Links to changelog, updated schedule, slotted in 2 weeks of testing at the end so that there's no ambiguity with PR merge dates.

* Clarify keyboard moves.

* Fix dates

* Sidebar

* Fixup dates.

* Fixup dates.

* Wording.

fix typos (#15316)

Fix HOLD_ON_OTHER_KEY_PRESS after #11059 (#15307)

that broke compilation because of a typo: KEYPRESS should have been
KEY_PRESS