feat: added internal database option to project addition

[ymarcon]

No description provided.

[Copilot]

🟡 Changes recommended

The create-project payload now always sends internalDatabase: false when no database is provided, which can alter API compatibility/semantics and should be made backward-safe (and covered by tests).

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Pull request overview

This PR adds an “internal database” option when creating Opal projects via the Python client/CLI, and bumps the package version to 6.2.0 alongside a few formatting/doc touch-ups.

Changes:

• Add --internal/-i option (argparse + Typer CLI) and plumb it into ProjectService.add_project().
• Include an internalDatabase flag in the project creation payload when no explicit database is provided.
• Version bump to 6.2.0 plus minor formatting updates (README example, docstring, request chaining).

File summaries

File	Description
uv.lock	Bumps locked package version to 6.2.0.
README.md	Reformats example code (string quoting / line wrapping).
pyproject.toml	Bumps project version to 6.2.0.
obiba_opal/system.py	Docstring formatting adjustment.
obiba_opal/project.py	Adds --internal option and includes internalDatabase in create-project payload.
obiba_opal/file.py	Refactors request chaining formatting and simplifies options dict formatting.
obiba_opal/commands.py	Adds Typer CLI --internal/-i option and passes it through.

Review details

• Files reviewed: 5/7 changed files
• Comments generated: 3
• Review effort level: Lite

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