Use static links for documentation

[marstamm]

Is your feature request related to a problem? Please describe.

We are currently link to sites in the cloud docs that might change with restructurings. In some cases, we even reference a specific subheading.

Should the structure or even wording change, we either need to update the links or a redirect has to be created. Over the long run, more redirects are added which might not be maintainable.

cf. #2769

Describe the solution you'd like

Instead, use a static link that always redirects to a specific page, e.g.

• docs.camunda.io/ref/modeler-1111 -> docs.camunda.io/docs/components/modeler/bpmn/timer-events/#time-duration
• docs.camunda.io/ref/modeler-timer -> docs.camunda.io/docs/components/modeler/bpmn/timer-events/#time-duration
• ...

This ensures that the links continue to work in all modeler versions and always reference a valid site. Also, the number of redirects to be maintained is static.

Describe alternatives you've considered

Keep the current process of adding redirects when sites go dead.