motivation: highlight the need to address overflow in metric objects that are integer based
changes:
* add section in the readme about addressing woverflow
* fix timer's unit conversion to address potential overflow
motivation: allow middleware libraries better control of metric object lifecycle to reduce potential memory footprint when using metrics libraries that use some kind of registry or cache (eg polling backends)
changes:
* Introduce metric.destroy() to enable lifecycle management
* Add destroy functions to example impl in readme
motivation: use consistent formatting
changes: update generate_linux_tests to match the formatting rules we use: `swiftformat --self insert --patternlet inline --stripunusedargs unnamed-only --comments ignore`
* prepare to release
motivation: the sswg voted to adopt the API. this is to prepare to a release
changes:
* rewrite readme
* add API docs
* add utilitiy scripts and docker setup for CI
* adjust linux tests