Add .ohwr.yaml

.ohwr.yaml

+---
+# SPDX-FileCopyrightText: 2024 CERN (home.cern)
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+version: '1.0.0'
+name: 'Hydra - a radiation-tolerant SoC'
+description: 'https://ohwr.org/project/hydra/wikis/home'
+website: 'https://ohwr.org/project/hydra'
+images:
+  - 'https://ohwr.org/project/hydra/wikis/uploads/c4ae067f62937dedb2a910ca2bddbfab/Hydra.png'
+documentation: 'https://ohwr.org/project/hydra/wikis'
+issues: 'https://ohwr.org/project/hydra/issues'
+