Remove session management, code cleanup

What's Changed

• Add macros, fix session management by @WhySoBad in #1
• Update rust version and docker base image version

Full Changelog: v0.1.0...v0.1.1-fix.1

Initial release

First release

A small summary of the functionalities and contents:

• Support for L530, L630, L900 color light bulbs
• Support for L510, L520 and L610 non-color light bubs
• Support for generic light devices with limited feature set
• A cli to host and interact with the included gRPC server