* add simulation mode for easier development
* improved sensor file watcher, poc cpu & mem usage
Trigger file read by rename event
* feat: system information sensor tool
Gather various sensor values with the sysinfo crate:
https://github.com/GuillaumeGomez/sysinfo
Values can be written to a sensor source file with the `--out` cmd line
option for the `asterctl` tool.
* ci: build sysinfo tool and include in build artifact
* feat: support integerDigits, decimalDigits sensor value format options
* docs: update documentation
Closes#6
Markus Zehnder