feat: add entity_category for indicator-light

[caibinqing]

Why

When user turn off lights in an area, the indicator-light will also be turned off.

#696

https://developers.home-assistant.io/docs/core/entity/#registry-properties

Classification of a non-primary entity. Set to EntityCategory.CONFIG for an entity that allows changing the configuration of a device, for example, a switch entity, making it possible to turn the background illumination of a switch on and off. Set to EntityCategory.DIAGNOSTIC for an entity exposing some configuration parameter or diagnostics of a device but does not allow changing it, for example, a sensor showing RSSI or MAC address.

Added

Added a new configuration item to SPEC_SERVICE_TRANS_MAP

Set the EntityCategory for indicator-light to CONFIG

Further

Assign the appropriate EntityCategory to other entities so they can be easily identified and correctly classified.