* feat(nix): Enable persistent volume for shared nix-store

* fix: Wrong mount

* fix: Switch to persistent volumes per devcontainer, fixes renamed nix package used in test

* Update src/nix/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* fix: Bump version

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Co-authored-by: Flo Müller <flo.mueller@gec.io>
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>