docs: adding contributing page #1854

Job	Run time
meta	9s
fossa-scan	1m 7s
compliance-copyrights	24s
pre-commit	18s
security-sast-semgrep	18s
test-splunk-unit	26s
test-splunk-external (9.1.3, d95b3299fa65, true, false)	6m 16s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_connection_docker)	2m 7s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_fiction)	5m 39s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_broken)	22m 52s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_cim_fiction)	5m 58s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_cim_broken)	8m 6s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_fiction_indextime)	5m 52s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_fiction_indextime_broken)	4m 11s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_fiction_indextime_wrong_hec_token)	3m 8s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_setup_fixture)	4m 13s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_req)	4m 28s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_app_req_broken)	12m 34s
test-splunk-matrix (9.1.3, d95b3299fa65, true, false, splunk_cim_model_ipv6_regex)	8m 31s
publish	30s
	1h 37m 7s

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