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Add intro to Readme #1105

Job	Run time
Python 3.9 testing with elasticsearch8	1m 53s
Python 3.9 testing with elasticsearch7	1m 45s
Python 3.9 testing with opensearch	1m 49s
Python 3.10 testing with elasticsearch7	1m 47s
Python 3.11 testing with elasticsearch8	2m 11s
Python 3.10 testing with opensearch	1m 49s
Python 3.11 testing with elasticsearch7	2m 9s
Python 3.12 testing with elasticsearch8	1m 50s
Python 3.10 testing with elasticsearch8	2m 4s
Python 3.12 testing with elasticsearch7	1m 53s
Python 3.11 testing with opensearch	2m 9s
Python 3.13 testing with elasticsearch8	1m 56s
Python 3.13 testing with opensearch	1m 59s
Python 3.12 testing with opensearch	1m 53s
Python 3.13 testing with elasticsearch7	1m 46s
	28m 53s

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