Add project initialization command

[baksvell]

Summary

Adds the new livedoc init command for quickly preparing a project to use LiveDoc.

Changes

• added livedoc init [path]
• creates a .livedoc.json configuration file
• creates the documentation directory
• creates a starter docs/README.md
• added support for a custom documentation directory through --docs
• added safe overwrite behavior through --force
• prevents the documentation directory from being created outside the project
• added command help and README documentation
• added tests for initialization, repeated runs, overwrite behavior, and invalid paths

Examples

livedoc init .
livedoc init . --docs documentation
livedoc init . --force

After initialization:

livedoc symbols .
livedoc . --docs docs

Validation

• Ruff passed
• 84 tests passed
• initialization tested in a clean temporary project
• existing symbols and documentation-check commands remain compatible

Notes

The package version intentionally remains 0.1.8. It will be updated to 0.2.0 during release preparation after all planned functionality is completed.