MSYS2 install: use MinGW python-qmk package (#17302)

* MSYS2 install: use MinGW python-qmk package

* Add missing flashers

* Note VC Redist for manual install

* VC Redist no longer needed

docs/newbs_getting_started.md

@@ -36,21 +36,15 @@ Alternatively, if you'd like to manually install MSYS2, the following section wi
 
 #### Prerequisites
 
-You will need to install MSYS2, Git and Python. Follow the installation instructions on https://www.msys2.org.
+You will need to install [MSYS2](https://www.msys2.org). Once installed, close any open MSYS terminals (purple icon) and open a new MinGW 64-bit terminal (blue icon) from the Start Menu.
-
-Once MSYS2 is installed, close any open MSYS terminals and open a new MinGW 64-bit terminal.
 
 !> **NOTE:** The MinGW 64-bit terminal is *not* the same as the MSYS terminal that opens when installation is completed. Your prompt should say "MINGW64" in purple text, rather than "MSYS". See [this page](https://www.msys2.org/wiki/MSYS2-introduction/#subsystems) for more information on the differences.
 
-Then run the following command:
-
-    pacman --needed --noconfirm --disable-download-timeout -S git mingw-w64-x86_64-toolchain mingw-w64-x86_64-python3-pip mingw-w64-x86_64-python-pillow
-
 #### Installation
 
 Install the QMK CLI by running:
 
-    python3 -m pip install qmk
+    pacman --needed --noconfirm --disable-download-timeout -S git mingw-w64-x86_64-python-qmk
 
 </details>
 

util/install/msys2.sh

@@ -7,17 +7,14 @@ _qmk_install_prepare() {
 _qmk_install() {
     echo "Installing dependencies"
 
-    pacman --needed --noconfirm --disable-download-timeout -S pactoys-git
+    pacman --needed --noconfirm --disable-download-timeout -S pactoys
     pacboy sync --needed --noconfirm --disable-download-timeout \
-        base-devel: toolchain:x clang:x git: unzip: python3-pip:x \
+        base-devel: toolchain:x clang:x python-qmk:x hidapi:x \
-        avr-binutils:x avr-gcc:x avr-libc:x arm-none-eabi-binutils:x \
+        avr-binutils:x avr-gcc:x avr-libc:x \
-        arm-none-eabi-gcc:x arm-none-eabi-newlib:x avrdude:x bootloadhid:x \
+        arm-none-eabi-binutils:x arm-none-eabi-gcc:x arm-none-eabi-newlib:x \
-        dfu-programmer:x dfu-util:x teensy-loader-cli:x hidapi:x \
+        avrdude:x bootloadhid:x dfu-programmer:x dfu-util:x hid-bootloader-cli:x mdloader:x teensy-loader-cli:x wb32-dfu-updater:x
-        python-appdirs:x python-colorama:x python-jsonschema:x python-pillow:x python-pygments:x
 
     _qmk_install_drivers
-
-    python3 -m pip install -r "$QMK_FIRMWARE_DIR/requirements.txt"
 }
 
 _qmk_install_drivers() {