feat(cargo): add workspaces as dependencies and use workspace relationship for them

[DmitriyLewen]

Description

After #7889 we can save workspaces and mark them as workspace relationship.

Required changes:

• save workspaces as Packages
• use workspace relationship for these packages
• add relationships between workspaces and direct packages of workspaces.
• detect project id from root Cargo.toml file to add root package and add workspaces as dependencies of root package