feat: add --project-dir option to create command

[nilshamerlinck]

Summary

• Adds --project-dir option that uses odoo-addons-path to auto-detect --addons-path, --odoo-dir, and --preset=project
• Makes ODOO_VERSION optional when --project-dir is used — inferred from odoo/release.py
• Adds odoo-addons-path as a dependency

Usage

# Before: all parameters manual
odoo-venv create 18.0 --preset project --odoo-dir /path/to/project/odoo --addons-path "..."

# After: single flag does it all
odoo-venv create --project-dir /path/to/project

Test plan

• odoo-venv create --project-dir /path/to/project --dry-run — auto-detects everything
• odoo-venv create 18.0 --project-dir /path --dry-run — explicit version takes precedence
• odoo-venv create --preset local --project-dir /path --dry-run — explicit preset takes precedence
• odoo-venv create --dry-run — errors with clear message about missing ODOO_VERSION
• odoo-venv create 18.0 --dry-run — existing behavior unchanged

🤖 Generated with Claude Code

[nilshamerlinck]

• waiting for F#T67239
• and for --create-launcher, which will behave a little bit differently when we have --project-dir: launcher will execute odoo-addons-path to obtain a dynamic addons_path at each launch

[nilshamerlinck]

superseded by #12