Add RegexTextSearch Kotlin sample #61

Job	Run time
run-samples (windows-latest, TextExtract)	2m 12s
run-samples (windows-latest, FlattenTransparency)	1m 40s
run-samples (windows-latest, SplitPDF)	1m 33s
run-samples (windows-latest, ConvertToOffice)	1m 49s
run-samples (windows-latest, MergePDF)	1m 50s
run-samples (windows-latest, ListWords)	3m 3s
run-samples (windows-latest, PDFOptimize)	1m 59s
run-samples (windows-latest, PDFAConverter)	2m 0s
run-samples (windows-latest, Redactions)	2m 1s
run-samples (windows-latest, RegexTextSearch)	2m 1s
run-samples (ubuntu-latest, TextExtract)	1m 26s
run-samples (ubuntu-latest, FlattenTransparency)	1m 21s
run-samples (ubuntu-latest, SplitPDF)	1m 23s
run-samples (ubuntu-latest, ConvertToOffice)	1m 29s
run-samples (ubuntu-latest, MergePDF)	1m 18s
run-samples (ubuntu-latest, ListWords)	1m 24s
run-samples (ubuntu-latest, PDFOptimize)	1m 19s
run-samples (ubuntu-latest, PDFAConverter)	1m 18s
run-samples (ubuntu-latest, Redactions)	1m 21s
run-samples (ubuntu-latest, RegexTextSearch)	1m 28s
	33m 55s

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