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/flight_modes/index.md

@@ -0,0 +1,16 @@
+# 飞行模式
+
+Flight modes provide autopilot support to make it easier to manually fly the vehicle, to automate common tasks such as takeoff and landing, to execute autonomous missions, or to defer flight control to an external system.
+
+关于特定机架可用的飞行模式信息，请参阅以下章节：
+
+- [Flight Modes (Multicopter)](../flight_modes_mc/index.md)
+- [Flight Modes (Fixed-Wing)](../flight_modes_fw/index.md)
+- [Flight Modes (VTOL)](../flight_modes_vtol/index.md)
+- [Drive Modes (Differential Rover)](../flight_modes_rover/differential.md)
+- [Drive Modes (Ackermann Rover)](../flight_modes_rover/ackermann.md)
+
+:::info
+本节中的模式子主题包含所有机体共有的信息，但可能与正常/默认设置无关。
+一般来说，你应该首先看到特定机体的章节，并在关联导航到这些通用的章节。
+:::