Picologging

* Add Fuzzing and coverage configuration for Clang/GCC by tonybaloney in https://github.com/microsoft/picologging/pull/26
* Add WatchedFileHandler by aminalaee in https://github.com/microsoft/picologging/pull/23
* Expand test suite with error cases by tonybaloney in https://github.com/microsoft/picologging/pull/27
* Refactor type field initializers to `__new__` by tonybaloney in https://github.com/microsoft/picologging/pull/28
* Add tests for FileHandler delay by aminalaee in https://github.com/microsoft/picologging/pull/24
* Add BaseRotatingHandler by aminalaee in https://github.com/microsoft/picologging/pull/25

* Added `FileHandler` to picologging
* Fixed an issue with the `Logger.setLevel()` method not correctly resetting level flags in the logger
* Fixed a memory leak in the logging and handler types

* Adds `.close()`, `.flush()`, `.createLock()` abstract methods to Handler https://github.com/microsoft/picologging/pull/9
* Corrected type stubs for Handler `__init__`
* Added simple `handleError` method to base Handler type to print the exception on sys.stderr
* Added `.get_name()` and `.set_name()` methods to Handler
* Fixes a bug in stream handler swallowing error message when `.write()` failed on the underlying stream
* Repeat all tests and isolate reference bugs in formatter and handler https://github.com/microsoft/picologging/pull/12
* Fix root logger instantiation with wrong arguments https://github.com/microsoft/picologging/pull/15
* Fix getlevelname missing from module https://github.com/microsoft/picologging/pull/16
* Fixes StreamHandler not defaulting to sys.stderr when stream argument is None https://github.com/microsoft/picologging/pull/18

* Initial release
* Handler base class
* Stream Handler support