Add config for Pirnar SmartLux Door Light (#5451)
* Add config for Pirnar SmartLux Door Light
* fix(smartlux): update name and remove unused entities
* missed exterior
* Refactor entity names and clean up comments
- rename file to include brand and device type
- Updated entity names to use proper casing and removed comments for clarity.
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>