Unhardcoded comfort, warmth and feet fire bonus values for furniture

[ZhilkinSerg]

Summary

SUMMARY: Infrastructure "Unhardcoded comfort, warmth and feet fire bonus values for furniture"

Purpose of change

Unhardcoded some data for furniture and moved it to json.

Describe the solution

Moved three new fields for furniture from code to json:

• comfort;
• floor_bedding_warmth;
• bonus_fire_warmth_feet.

[mlangsdorf]

Two suggestions:
comfort should really be a field, not a flag, because the f_sofa stuff is referenced again in player::base_comfort_value().
There should be a second field "bedding_warmth" that replaces the hardcoded logic in player::floor_bedding_warmth()

[ZhilkinSerg]

I was thinking about warmth too, but didn't notice ids are being used in base_comfort_value.

I guess it is time to move comfort levels for furniture from enum to json.

enum class comfort_level {
    uncomfortable = -999,
    neutral = 0,
    slightly_comfortable = 3,
    comfortable = 5,
    very_comfortable = 10
};

[kevingranade]

This pull request has been mentioned on Cataclysm: Dark Days Ahead. There might be relevant details there:

https://discourse.cataclysmdda.org/t/how-to-make-comfortable-furniture-terrain/18019/10