refactor: set up monorepo #1533

Job	Run time
Install on Node.js v18	1m 33s
Install on Node.js v20	1m 10s
Lint on Node.js v18	1m 0s
Test (Integration) on Node.js v18	10m 36s
Lint on Node.js v20	57s
Audit on Node.js v18	16s
Test (Unit) on Node.js v18	1m 12s
Test (Integration) on Node.js v20	10m 52s
Audit on Node.js v20	14s
Test (Unit) on Node.js v20	1m 11s
Test (Integration) on Node.js v18 with L3	11m 57s
Test (Integration) on Node.js v20 with L3	12m 18s
Test (Integration) on Node.js v18 with L3 with custom gas token (16 decimals)	12m 46s
Test (Integration) on Node.js v20 with L3 with custom gas token (16 decimals)	12m 16s
Test (Integration) on Node.js v18 with L3 with custom gas token (18 decimals)	12m 19s
Test (Integration) on Node.js v20 with L3 with custom gas token (18 decimals)	12m 17s
Test (Integration) on Node.js v18 with L3 with custom gas token (20 decimals)	12m 51s
Test (Integration) on Node.js v20 with L3 with custom gas token (20 decimals)	13m 1s
	2h 8m 46s

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