Add xGRIB 0.2.0.0 to Alpha catalogue

[pob220]

Adds xGRIB 0.2.0.0 metadata for Debian 12/13 x86-64, Ubuntu 22.04/24.04 x86-64, Flatpak 25.08 x86-64, Windows x86 and macOS ARM64.

Packages: https://cloudsmith.io/~pob220/repos/xgrib-alpha/
Source: https://github.com/pob220/xgrib_pi/tree/v0.2.0.0
CircleCI: https://app.circleci.com/pipelines/circleci/K9DC7cYmiJNgi5mJSq9gdA/9i2h2Aqn6Ti4GKHkCjT89s/45/workflows/a5b4fb7d-8ae2-46b8-9d32-cfe3759c2ce6

Validation:

• All release build, test, package, metadata, merge and output-verification jobs passed.
• Windows package installed and loaded in OpenCPN 5.14; selected paths, 64-bit helper launch, merge and combined-file reopen passed.
• OpenCPN metadata schema validation passed.
• Official URL checker: 18 URLs checked, 0 errors.
• Published SHA-256 values match the retained release manifests.

ARM Linux/Flatpak metadata is intentionally omitted pending a physical Raspberry Pi runtime test.