Add lazy-serial library

[james-clark-au]

New library hosted on https://bitbucket.org/jamesneko/lazy-serial for easy serial command callback system.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://bitbucket.org/jamesneko/lazy-serial:

Linting library in lazy-serial
WARNING: library.properties maintainer value James <arduino@neko.stream> contains "Arduino". 3rd party libraries are not
         maintained by Arduino.                                                                                         
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP057)                                                                                                   

Linter results for project: 0 ERRORS, 1 WARNINGS

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Linting sketch in lazy-serial/examples/hello_lazy_serial

Linter results for project: no errors or warnings

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Linter results for projects: 0 ERRORS, 1 WARNINGS

[github-actions]

Your submission has now been accepted! Thanks for your contribution to the Arduino Library Manager index.

The library(s) will be available for installation via Library Manager within a day's time.

You can check the logs from the Library Manager indexer for your library(s) here:
http://downloads.arduino.cc/libraries/logs/bitbucket.org/jamesneko/lazy-serial/