feat(balance): high cook skill = more food fun

[scarf005]

Purpose of change (The Why)

idea by @jeremy7986 https://discord.com/channels/830879262763909202/830916451517857894/1494335607927869511

Improve cooked food morale so higher cooking skill gives better enjoyment and softens negative enjoyment.

Describe the solution (The How)

• Store cooking skill on cooked and dehydrated craft results, then scale final fun by 10% per level with flooring.
• Apply the same scaling to negative fun so bad cooked food is less unpleasant.
• Fall back to the eater's current cooking skill for items that only carry the COOKED flag.

Testing

• cmake --build --preset linux-full --target cataclysm-bn-tiles cata_test-tiles
• ./out/build/linux-full/tests/cata_test-tiles "[fun_for][food][cooking]"

Checklist

Mandatory

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax.
• I've committed my changes to a new branch that isn't main.

^{PR opened by gpt-5.4 high on opencode}