[feat] Layer Zero Relayer support (#36)

* Chore: Add ABIs for Layer Zero Collector

* Chore: Add store and utils functions which collector is dependent on

* Chore: Add the script that initialises the worker and the worker script itself that functions as a layer-zero collector.

* Fix: remove useless comments and improve readability of decodeHeader

* Fix: Requested changes related to logging

* Fix: Improve queryLogs function in order to have consistency on the relayer

* Fix: remove debugging code

* fix: Error logging

* chore: Remove unused import

* feat: Add layer-zero example configuration

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Co-authored-by: Jorge Sanmiguel <[email protected]>