Add PWM_*_CENTERx for each servo.
Use a bilinear transform to map actuator_servos to PWM signals.

This solution only works for PWM based servos. Other types of servos are not affected.

* PWM: Add servo trim option

* PWM: Improve documentation of PWM trim feature

* PWM: cleaner clamping and docs typo

* update documentation & safety

* add migration formula

* rename param from trim to center

* docs with center instead of trim

* move clamping and reorder values

* improve documentation

* adress failing range check

* improve documentation

* CA: add event for setting CENTER with TRIM

Signed-off-by: Silvan <silvan@auterion.com>

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Signed-off-by: Silvan <silvan@auterion.com>
Co-authored-by: Silvan <silvan@auterion.com>

* Add Wheel and Gimbal support to PWM center

* Document Center feature for PWM Gimbal

It's unmaintained and the docker version it uses is not supported anymore.

Remove the step that uploaded every version tag to the stable/ S3
directory, which caused QGC users selecting "stable" to receive
pre-release firmware (#26340). The stable/ and beta/ directories
are now controlled exclusively by their respective branch pushes,
while version tags only upload to their versioned archive directory
(e.g., v1.16.1/). Pre-release tags are also correctly marked on
GitHub Releases.

Co-authored-by: Julian Oes <julian@oes.ch>

Fixes #26340

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