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 adds support
for:

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

A major implementation change is the internal use of a "real name" to uniquely identify packages since the value coming from the name field is not unique anymore.

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