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/zh/telemetry/sik_radio.md

@@ -0,0 +1,37 @@
+# SiK 电台
+
+[SiK radio](https://github.com/LorenzMeier/SiK) is a collection of firmware and tools for telemetry radios.
+
+PX4 is protocol-compatible with radios that use _SiK_.
+SiK Radios often come with appropriate connectors/cables allowing them to be directly connected to [Pixhawk Series](../flight_controller/pixhawk_series.md) controllers
+(in some cases you may need to obtain an appropriate cable/connector).
+Typically you will need a pair of devices - one for the vehicle and one for the ground station.
+
+Hardware for the SiK radio can be obtained from various manufacturers/stores in variants that support different range and form factors.
+
+![SiK Radio](../../assets/hardware/telemetry/holybro_sik_radio.jpg)
+
+## Vendors
+
+- [RFD900 Telemetry Radio](../telemetry/rfd900_telemetry.md)
+- [Holybro Telemetry Radio](../telemetry/holybro_sik_radio.md)
+- <del>_HKPilot Telemetry Radio_</del> (Discontinued)
+- <del>_3DR Telemetry Radio_</del> (Discontinued)
+
+## Setup/Configuration
+
+The ground station-based radio is connected via USB (essentially plug-n-play).
+
+The vehicle-based radio is connected to the flight-controller's `TELEM1` port, and typically requires no further configuration.
+
+## 固件更新
+
+Hardware sourced from most [vendors](#vendors) should come pre-configured with the latest firmware.
+You may need to update older hardware with new firmware, for example to gain support for MAVLink 2.
+
+You can update the radio firmware using _QGroundControl_: [QGroundControl User Guide > Loading Firmware](https://docs.qgroundcontrol.com/master/en/qgc-user-guide/setup_view/firmware.html).
+
+## 高级安装/配置
+
+The Development section has [additional information](../data_links/sik_radio.md) about building firmware and AT-command based configuration.
+This should not be required by non-developers.