fix(chart): allow kubeVersion pre-release suffixes from managed providers (#102)

Per semver, a range like >=1.28.0 only matches pre-release versions when
the range itself contains a pre-release identifier. GKE and EKS report
versions with vendor build suffixes (e.g. v1.35.5-gke.1057002), which
count as pre-releases and were rejected by the constraint. Appending -0,
the lowest pre-release identifier, keeps the same lower bound while
accepting vendor-suffixed versions.

Fixes #101

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: stubbi

charts/paperclip-operator/Chart.yaml

@@ -6,7 +6,7 @@ description: >-
 type: application
 version: 0.18.0
 appVersion: 0.18.0
-kubeVersion: '>=1.28.0'
+kubeVersion: '>=1.28.0-0'
 keywords:
   - paperclip
   - ai