fdb: add ICON grid support changes from ECMWF hackathon#42

Draft

lmeinen wants to merge 14 commits intomainfrom

feature/eccodes_eckit_dependency

Commits on Jan 23, 2026

enable eckit_geo as seen in nwp_polytope Hackathon branch
lmeinen
committed

Commits on Feb 18, 2026

update environments.yaml
lmeinen
committed

Commits on Feb 23, 2026

Commits on Mar 2, 2026

add new package versions
lmeinen
committed

Commits on Mar 4, 2026

add newest package versions
lmeinen
committed

Commits on Mar 6, 2026

updated dependencies based on emanuele's feedback
lmeinen
committed

Commits on Mar 9, 2026

update fdb & metkit to use matching releases
lmeinen
committed