v0.8.0: Implement labels with async-profiler's contextId (#36)
* Implement tags with async-profiler's contextId
* Add demo module
* Add labels uploading, address review comments
* fix uploader
* Rename Tags to Labels, introduce LabelsSet, rename Scope to ScopedContext
* Add concurrent refcounted labels implementation
* Upload jfr & labels as files
* Update async-profiler to a forked version 2.8.0.2 with contextId support
* Do not use Map.of for java8. Fix windows build
* disable windows on github actions
* switch to protobuf
rename protobuf messages
* fix collapsed upload
* Add static labels
* more consistent naming
* fix build