[Task] Create Stronghold (Snapshot)

[eike-hass]

Description

• Create blank Snapshot at predefined path (return autogenerated PW)
• Fail if file exists

Motivation

Describe the motivation for the feature to be developed.

Resources

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To-do list

Create a task-specific to-do list. Please link PRs that match the TODO list item behind the item after it has been submitted.

• [ ] Item one
• [ ] Item two
• [ ] Item three

Change checklist

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• [ ] The feature or fix is implemented in Rust and across all bindings whereas possible.
• [ ] The feature or fix has sufficient testing coverage
• [ ] All tests and examples build and run locally as expected
• [ ] Every piece of code has been document according to the documentation guidelines.
• [ ] If conceptual documentation (mdbook) and examples highlighting the feature exist, they are properly updated.
• [ ] If the feature is not currently documented, a documentation task Issue has been opened to address this.