HA's core climate component already ships default icons for common
preset_mode/fan_mode values (eco, away, sleep, auto, low/medium/high,
...), but this integration's own values -- WindFree (nano/nanosleep),
Quiet, Smart, Speed, Long wind, the motion-aware direct/indirect
presets, Dry comfort, 2-Step, and the turbo/max fan speeds some boards
report -- fall outside that vocabulary and rendered with the generic
circle-dot fallback (the icon the #169 screenshot is missing). Adds
icons.json with an icon per value, mirroring the state-label catalog
these same values already have in translations/en.json.