Move PX4 Guide source into /docs (#24490)

* Add vitepress tree

* Update existing workflows so they dont trigger on changes in the docs path

* Add nojekyll, package.json, LICENCE etc

* Add crowdin docs upload/download scripts

* Add docs flaw checker workflows

* Used docs prefix for docs workflows

* Crowdin obvious fixes

* ci: docs move to self hosted runner

runs on a beefy server for faster builds

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* ci: don't run build action for docs or ci changes

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* ci: update runners

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

* Add docs/en

* Add docs assets and scripts

* Fix up editlinks to point to PX4 sources

* Download just the translations that are supported

* Add translation sources for zh, uk, ko

* Update latest tranlsation and uorb graphs

* update vitepress to latest

---------

Signed-off-by: Ramon Roche <mrpollo@gmail.com>
Co-authored-by: Ramon Roche <mrpollo@gmail.com>

docs/uk/flight_controller/pixhack_v3.md

@@ -0,0 +1,85 @@
+# Pixhack V3
+
+:::warning
+PX4 не розробляє цей (або будь-який інший) автопілот.
+Contact the [manufacturer](https://store.cuav.net/) for hardware support or compliance issues.
+:::
+
+The CUAV _Pixhack V3_ flight controller board is a flexible autopilot intended primarily for manufacturers of commercial systems.
+
+The board is a variant of the SOLO Pixhawk<sup>&reg;</sup> 2 (PH2) flight controller, which is in turn based on the [Pixhawk-project](https://pixhawk.org/) **FMUv3** open hardware design.
+It runs PX4 on the [NuttX](https://nuttx.apache.org/) OS, and is fully compatible with both PX4 or ArduPilot<sup>&reg;</sup> (APM) firmware.
+
+_Pixhack V3_ has significant improvements with respect to the original design, including better interface layout and the addition of vibration damping and a thermostat system.
+
+![Pixhack v3](../../assets/flight_controller/pixhack_v3/pixhack_v3_157_large_default.jpg)
+
+:::info
+This flight controller is [manufacturer supported](../flight_controller/autopilot_manufacturer_supported.md).
+:::
+
+## Короткий опис
+
+- Мікропроцесор:
+  - STM32F427
+  - STM32F100 (відмовостійкий співпроцесор)
+- Датчики:
+  - Акселерометри (3): LS303D, MPU6000, MPU9250/hmc5983
+  - Гіроскопи (3): L3GD20, MPU6000, MPU9250
+  - Компаси (2): LS303D, MPU9250
+  - Барометри (2): MS5611 X2
+- Інтерфейси:
+  - MAVLink UART (2)
+  - GPS UART (2)
+  - DEBUG UART (1)
+  - RC IN (для PPM, SBUS, DSM/DSM2)
+  - RSSI IN: PWM OR 3.3ADC
+  - I2C (2)
+  - CAN BUS (1)
+  - ADC IN: 3.3В X1 , 6.6В X1
+  - PWM OUT: 8 PWM IO + 4 IO
+- Система живлення:
+  - PM POWER IN: 4.5 ~ 5.5 В
+  - USB POWER IN: 5.0 В +- 0.25В
+- Вага та розміри:
+  - Вага: 63г
+  - Ширина: 68мм
+  - Товщина: 17мм
+  - Довжина: 44мм
+- Інші характеристики:
+  - Температура роботи: -20 ~ 60°C
+
+## Доступність
+
+Плату можна придбати з:
+
+- [store.cuav.net](http://store.cuav.net/index.php?id_product=8\&id_product_attribute=0\&rewrite=pixhack-v3-autopilot\&controller=product\&id_lang=3)
+- [leixun.aliexpress.com/store](https://leixun.aliexpress.com/store)
+
+## Збірка прошивки
+
+:::tip
+Most users will not need to build this firmware!
+It is pre-built and automatically installed by _QGroundControl_ when appropriate hardware is connected.
+:::
+
+To [build PX4](../dev_setup/building_px4.md) for this target:
+
+```
+make px4_fmu-v3_default
+```
+
+## Розпіновки та схеми
+
+- [Documentation/wiring guides](http://doc.cuav.net/flight-controller/pixhack/en/pixhack-v3.html)
+
+## Налаштування послідовного порту
+
+| UART   | Пристрій   | Порт                                          |
+| ------ | ---------- | --------------------------------------------- |
+| UART1  | /dev/ttyS0 | IO debug                                      |
+| USART2 | /dev/ttyS1 | TELEM1 (керування потоком) |
+| USART3 | /dev/ttyS2 | TELEM2 (керування потоком) |
+| UART4  |            |                                               |
+| UART7  | CONSOLE    |                                               |
+| UART8  | SERIAL4    |                                               |