fix(registry-promo): adjust logic for isDefaultRegistry

[samuv]

as per title, we were checking name instead of type

[Copilot]

Pull request overview

Adjusts the registry promo/meta-filter gating logic to correctly detect the built-in default registry using the registry type (instead of the registry name), aligning UI behavior with how registry configuration is represented in the API.

Changes:

• Update isDefaultRegistry detection to use registryData.type (default vs url/file/api) with a fallback for missing type.
• Update route tests to set type in mock overrides instead of mutating name.
• Extend the registry-by-name MSW fixture to include type: 'default' by default.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
renderer/src/routes/(registry)/-registry.route.tsx	Switches default-registry detection logic from name-based to type-based to drive promo visibility and meta-server filtering.
renderer/src/routes/__tests__/registry.test.tsx	Updates test overrides to validate behavior based on registry type instead of name.
renderer/src/common/mocks/fixtures/registry_name/get.ts	Adds type: 'default' to the default mocked registry response to reflect API shape.