chore(main): release 0.20.0

[github-actions]

🤖 I have created a release beep boop

0.20.0 (2025-12-13)

Features

• improve breadcrumb (b9618a8)
• remove ".cook" in the breadcrumb (0cd458c)

Bug Fixes

• add export of shopping list in markdown format (11cbaa1)
• add export of shopping list in markdown format (8a5e65c)
• better alignment in the breadcrumb (f148fdf)
• notes are rendered in correct order between steps (web interface) (e4ad193)
• show pantry inventory even if pantry.conf is empty, but show link to preferences page only if pantry.conf is not found (f535295)
• use ingredient list with common names from aisle configuration (61152c3)

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