Added compress, convertUTF8 and extract scripts

compress

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+#!/bin/sh
+
+if [ -z "$1" ] || [ "$1" = '-h' ] || [ "$1" = '--help' ] || [ "$1" = 'help' ]; then
+	FILENAME=$(basename "$0")
+	printf "$FILENAME : tool to easily compress to tar.gz archives.
+Created by Pierre Saunders @saundersp 2021\n\nUsage:
+\t$FILENAME archive.tar.gz file1.txt file2.txt
+\tCompress file1.txt and file2.txt content in the archive.tar.gz where the command is executed.
+\n\t$FILENAME\n\t$FILENAME help\n\t$FILENAME --help\n\t$FILENAME -h\n\tDisplay this usage message.\n"
+else
+	tar -czvf "$@"
+fi

convertUTF8

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+#!/bin/sh
+
+if [ -z "$1" ] || [ "$1" = '-h' ] || [ "$1" = '--help' ] || [ "$1" = 'help' ]; then
+	FILENAME=$(basename "$0")
+	printf "$FILENAME : tool to easily convert file to UTF-8 encoding.
+Created by Pierre Saunders @saundersp 2021\n\nUsage:
+\t$FILENAME filename.txt\n\tConvert filename.txt to UTF-8 encoding.
+\n\t$FILENAME\n\t$FILENAME help\n\t$FILENAME --help\n\t$FILENAME -h
+\tDisplay this usage message.\n"
+else
+	TMP_FILE=$(mktemp)
+	iconv -f "$(file -i "$1" | cut -d = -f 2)" -t "UTF-8" "$1" > "$TMP_FILE" && mv "$TMP_FILE" "$1"
+fi

extract

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+#!/bin/sh
+
+if [ -z "$1" ] || [ "$1" = '-h' ] || [ "$1" = '--help' ] || [ "$1" = 'help' ]; then
+	FILENAME=$(basename "$0")
+	printf "$FILENAME : tool to easily extract tar.gz archives.
+Created by Pierre Saunders @saundersp 2021\n\nUsage:
+\t$FILENAME archive.tar.gz\n\tExtract content of archive where the command is executed.
+\n\t$FILENAME\n\t$FILENAME help\n\t$FILENAME --help\n\t$FILENAME -h\n\tDisplay this usage message.\n"
+else
+	tar -xzvf "$1"
+fi