Migrate climpact to the freva plugin template

In this issue we are going to migrate the current plugin to the freva-plugin-template

changed milestone to %Migrate existing plugins from previous phase of Nukleus to the new Feva-Plugin-Template

added Priority | High 🆕 Feature 🗂️ Sprint Backlog labels

assigned to @k202187

mentioned in issue #6

added ⏯️ In Progress label and removed 🗂️ Sprint Backlog label

added 🚧 Refactor label

mentioned in merge request !10 (merged)

added 👁️‍🗨️ Review Needed label and removed ⏯️ In Progress label

mentioned in commit 44b6fdfc

closed with merge request !10 (merged)