add timeshift app

apps/Timeshift/credits

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+app created by: teejee2008 
+https://github.com/teejee2008/
+
+Added to pi-apps by: Itai-Nelken
+https://github.com/Itai-Nelken/
+https://bit.ly/raspberry-pi-stuff-YT

apps/Timeshift/description

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+System restore tool for Linux hat provides functionality similar to the System Restore feature in Windows and the Time Machine tool in Mac OS.
+System restore tool for Linux. Creates filesystem snapshots using rsync+hardlinks, or BTRFS snapshots. Supports scheduled snapshots, multiple backup levels, and exclude filters. Snapshots can be restored while system is running or from Live CD/USB.
+
+to run from terminal: timeshift

apps/Timeshift/install-32

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+#!/bin/bash
+
+DIRECTORY="$(dirname "$(dirname "$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )")")"
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+cd $HOME/Downloads
+wget https://github.com/teejee2008/timeshift/releases/download/v20.11.1/timeshift_20.11.1_armhf.deb || error 'Failed to download timeshift!'
+sudo apt install -y --fix-broken ~/Downloads/timeshift_20.11.1_armhf.deb || error 'Failed to install .deb file!'
+rm -f timeshift_20.11.1_armhf.deb

apps/Timeshift/install-64

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+#!/bin/bash
+
+DIRECTORY="$(dirname "$(dirname "$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )")")"
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+cd $HOME/Downloads
+wget https://github.com/teejee2008/timeshift/releases/download/v20.11.1/timeshift_20.11.1_arm64.deb || error 'Failed to download timeshift!'
+sudo apt install -y --fix-broken ~/Downloads/timeshift_20.11.1_arm64.deb || error 'Failed to install .deb file!'
+rm -f timeshift_20.11.1_arm64.deb

apps/Timeshift/uninstall

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+#!/bin/bash
+
+DIRECTORY="$(dirname "$(dirname "$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )")")"
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+sudo apt purge -y timeshift
+sudo rm -rf /etc/timeshift

apps/Timeshift/website

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+https://github.com/teejee2008/timeshift