feat: support bin packages parsing

[upils]

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This PR is the first step to support the bin package kind in Chisel.

It introduces the Store concept and rework the package naming model so that Package.Name is always a unique identifier across the release, while the new Package.RealName field preserves the bare name of the package needed for package lookups.

It adds support for:

• a stores section in chisel.yaml
• a store and default-track fields in slice definition files.

The fetching and extraction of the corresponding bins will be implemented in a following PR.

[upils]

[Note to reviewer]: Out of consistency with the Package type, I am tempted to also rename this field to RealName. However it is not strictly needed for this struct as there is no other "name" in it.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

This PR introduces “store”-backed packages in release YAML (format v3+), adding store metadata parsing plus a split between a package’s unique identifier vs its archive-visible name.

Changes:

• Add stores parsing/validation in release YAML and new Store model on Release.
• Introduce Package.RealName alongside Package.Name (unique identifier), and update package parsing/serialization accordingly.
• Extend tests to cover store parsing rules and new YAML fields.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
internal/slicer/slicer.go	Uses RealName for archive operations and skips store packages when selecting archives.
internal/setup/yaml.go	Parses stores, adds store-related package fields, and derives unique package names via store prefixes.
internal/setup/setup.go	Adds Store/Stores types and validates packages’ store references; updates slice loading to key by unique package name.
internal/setup/setup_test.go	Updates expected package structures and adds tests for store parsing/validation and YAML formatting.
cmd/chisel/cmd_info.go	Copies RealName into package structures created for info selection.

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[upils]

[Note to reviewer]: Before the package parsing we only have the real name. So this check can now only be done after the package parsing because we need the package name.

[upils]

[Note to reviewer]: This must go away in the next PR when actually implementing the fetching of bins from the store. This is less disturbing solution I found, not requiring a refactoring of this function.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.