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Add intro to Readme #1109

Job	Run time
Python 3.9 testing with elasticsearch8	1m 55s
Python 3.10 testing with opensearch	1m 50s
Python 3.10 testing with elasticsearch7	1m 48s
Python 3.9 testing with elasticsearch7	1m 49s
Python 3.11 testing with elasticsearch8	2m 23s
Python 3.10 testing with elasticsearch8	1m 55s
Python 3.11 testing with opensearch	2m 13s
Python 3.12 testing with opensearch	2m 0s
Python 3.11 testing with elasticsearch7	2m 27s
Python 3.12 testing with elasticsearch8	1m 51s
Python 3.13 testing with opensearch	1m 51s
Python 3.12 testing with elasticsearch7	1m 45s
Python 3.13 testing with elasticsearch7	1m 50s
Python 3.13 testing with elasticsearch8	1m 59s
Python 3.9 testing with opensearch	1m 54s
	29m 30s

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