refactor: add AI client and unit tests #334

Job	Run time
go-versions / go-versions	5s
Windows, Go 1.23	2m 53s
Windows, Go 1.22	2m 32s
Windows, Go 1.18	41s
Linux, Go 1.18 / Benchmarks	4m 39s
Linux, Go 1.18 / Contract Tests	1m 26s
Linux, Go 1.18 / Unit Tests and Coverage	57s
Linux, Go 1.22 / Benchmarks	4m 42s
Linux, Go 1.22 / Contract Tests	1m 21s
Linux, Go 1.22 / Unit Tests and Coverage	1m 3s
Linux, Go 1.23 / Benchmarks	4m 36s
Linux, Go 1.23 / Contract Tests	1m 16s
Linux, Go 1.23 / Unit Tests and Coverage	59s
	27m 10s

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