New CLI package + restructure and overhaul monorepo + new features and fixes across packages

monorepo:

• Move volux package into it's own subdirectory to fix unpredictable build behavior and better isolate packages within monorepo
• Move audio_demo.py and basic_demo.py into voluxcli package
• Completely rewrite README
• Rename audio_demo.sh to audio-demo.sh
• Add script to easily enable voluxcli bash completions (enable-bash-completions.sh)
• Remove obsolete process.json file that used to be used with PM2
• Remove original setup.py that was specifically for the volux package
• Update pyproject.toml so Poetry can be used for development across entire monorepo

volux:

• Add .update_frames_off() method to Strobify util to allow the number of frames off to be changed on the fly
• Add .open_counter attribute to Strobify util to track the number of frames the gate has been open for
• Add get_sine util function for generating the y value of a sine wave for a given t value and hertz
• Add VoluxDemo base class for building voluxcli compatible demos
• Add simple README specific to volux package (installation steps and links to usage and various other package related things)
• Update package metadata

voluxcli:

• Create voluxcli package
• Create basic command-line interface
• Add ability to launch demos by ID using demo subcommand
• Add ability to list available demos
• Add shell completion support for demo IDs
• Add --version flag to list both voluxcli and volux version being used (and where they're imported from)
• Add audio and basic demos (originally stand-alone scripts from monorepo root)
• Add new hue demo which cycles the hue of a LIFX device with a specified label
• Add feature to automatically detect missing demo requirements before running demos
• Add feature to generate suggested install command for missing demo requirements (but only for specific packages)
• Add simple README specific to voluxcli package (installation steps, usage, common commands, links to volux package and other package related things)
• Update package metadata

voluxexamplemodule:

• Add simple README specific to voluxexamplemodule package (installation steps and links to usage and various other package related things)
• Update package metadata