Review Capabilities

[s-kostyuk]

The final review of Capabilities (at least I hope so) before their release.

Check the documentation for and implementation of the following Capabilities:

• [x] actuator - FIXME: Implementation depends on has_state and is_active caps but must not to
• [x] has_state - FIXME: Implementation depends on is_active cap but must not to
• [x] is_active
• [x] on_off
• [x] open_closed
• [x] multimode - Fixme: DOCS, no implementation
• [x] has_brightness - FIXME: Change to float, no implementation
• [x] has_color_hsb - FIXME: Change to float, no implementation
• [x] has_color_rgb - FIXME: Change to float, no implementation
• [x] has_value
• [x] has_volume - FIXME: No implementation

[s-kostyuk]

Implemented in a separate branch. Will be released when all related Thing subclasses will be updated correspondingly to the changes made.