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/ko/sensor/px4flow.md

@@ -0,0 +1,8 @@
+# PX4FLOW Smart Camera (Deprecated)
+
+<Badge type="info" text="Discontinued" />
+
+PX4 does not support the PX4Flow [optical flow](../sensor/optical_flow.md) sensor from PX4 v1.13 (it doesn't work with current firmware).
+PX4 may work with older PX4Flow firmware.
+
+Documentation has been removed (if needed, see [Legacy Docs for PX4Flow in v1.13](https://docs.px4.io/v1.13/en/sensor/px4flow.html)).