Add config for device EcoNour 42" tower fan HTS-F305A (new) (#5474)
* feat(devices): add EcoNour 42" tower fan
* fix: remove temperate F, use HA to convert from C
* fix(econour_htsf305a_towerfan): use temperature according to unit setting
- rename file to follow convention
- use fahrenheit temperature dp when set to f
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>