feat(zigbee2mqtt): Fix all lights

[cicoub13]

After feedback from community

• Fix models
• Fix brightness feature (not read_only)

[VonOx]

Oh good catch, that explain why slider is not available on dashboard.

[codecov]

Codecov Report

Merging #1127 (bd79992) into master (b878e6b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1127   +/-   ##
=======================================
  Coverage   96.26%   96.26%           
=======================================
  Files         638      638           
  Lines        8090     8090           
=======================================
  Hits         7788     7788           
  Misses        302      302           

Impacted Files	Coverage Δ
server/services/zigbee2mqtt/model/AduroSmart.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/Airam.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/Belkin.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/Calex.js	100.00% <ø> (ø)
...r/services/zigbee2mqtt/model/CommercialElectric.js	100.00% <ø> (ø)
...er/services/zigbee2mqtt/model/DresdenElektronik.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/ELKO.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/EcoSmart.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/GE.js	100.00% <ø> (ø)
server/services/zigbee2mqtt/model/GMYSmartBulb.js	100.00% <ø> (ø)
... and 26 more

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[Pierre-Gilles]

Looks good to me! Thanks for the fixes :)