docs: add LICENSE.txt for otel and ai modules (#215) #361

Job	Run time
go-versions / go-versions	3s
Windows, Go 1.23	2m 10s
Windows, Go 1.22	2m 25s
Windows, Go 1.18	1m 23s
Linux, Go 1.18 / Unit Tests and Coverage	1m 9s
Linux, Go 1.18 / Contract Tests	1m 22s
Linux, Go 1.18 / Benchmarks	4m 48s
Linux, Go 1.22 / Benchmarks	4m 38s
Linux, Go 1.22 / Contract Tests	1m 19s
Linux, Go 1.22 / Unit Tests and Coverage	1m 1s
Linux, Go 1.23 / Benchmarks	4m 37s
Linux, Go 1.23 / Contract Tests	1m 18s
Linux, Go 1.23 / Unit Tests and Coverage	55s
	27m 8s

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