Make FEEL Popup Links Configurable

[philippfromme]

Proposed Changes

• makes the links shown in the FEEL popup editor configurable
• links can be configured by end user instead of being hard-coded in core properties panel

Depends on bpmn-io/properties-panel#382
Related to https://github.com/camunda/product-hub/issues/2070#issuecomment-2449888911

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[nikku]

@philippfromme Please link this up to the overarching initiative ("link FEEL co-pilot"), is that https://github.com/camunda/product-hub/issues/2070?

[philippfromme]

Follow-up to bpmn-io/properties-panel#382.

[nikku]

Let's add a changelog entry. Changes look good to me.