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/features_mc/index.md

@@ -0,0 +1,9 @@
+# Multicopter-Specific Features
+
+This section lists features that are specific to (or customised for) multicopters:
+
+- [Flight Modes](../flight_modes_mc/index.md)
+- [Попередження зіткнень](../computer_vision/collision_prevention.md) (може використовувати комп'ютер-компаньйон або датчики на польотному контролері)
+- [Точна посадка](../advanced_features/precland.md)
+- [Terrain Following/Holding](../flying/terrain_following_holding.md)
+- [Запуск з катапульти або підкиданням](../flight_modes_mc/throw_launch.md)